Free 3D print files available for the MedSHIELD19 Mask Set and for other protection equipment projects


Reaching out to those with 3D printing capabilities to help healthcare workers get the pieces they need and also to all who can donate masks or other materials


Inviting designers, engineers, developers and medical professionals to work together for improving models and finding new solutions


The crisis for medical supplies caused by the coronavirus SARS-CoV-2 (COVID-19) pandemic has made us at Custom Surgical focus primarily on helping to prototype, print and share all the ideas from anyone involved in healthcare that could help.

MedSHIELD19 Mask Set with customized snorkeling masks

We supported the initiative of Dr. David Kohn and Dr. Cristian Muñiz of turning regular snorkeling masks into protection masks by adding HME filters through  3D printed adaptors. 

The system is composed of 3 parts:

Full face snorkeling mask: This is not 3D printed, but commercially available *see below under the “Compatible masks” section)

3D-printed adaptor: specific to each mask model. We’ve currently adapted to the two models below, but we’ve also published IGES and F3D files in this GitHub repo: So, everyone can modify them to fit their requirements.

HME filters: Medical-grade filters used in anesthesia machines, usually available in hospitals. If you don’t have access to them, you can also find them below and on GitHub, in other third-party projects.

If you don’t have a 3D printer, you can use one of the 3D printing services in your area or connect with a 3D printed volunteer listed below.

3D print adaptors models for attaching filters to snorkel masks

Choose below the 3D adaptor model you need for your specific snorkel mask model and what type of filters you want to attach.

Click the links to have the 3D print files sent to your email.

In order to ensure a proper cleaning and decontamination protocol for the snorkeling masks used in this project, please see the documentation shared by the Prakash Lab COVID-19 Response Group from Stanford at this link:

Frequently Asked Questions

What type of filter can be used?

Currently we have been using HME filters from Dräger, whose catalog can be found here. However, the coupling should work without any problem with other manufacturers, since it has been designed to couple with different filter sizes.

What is the duration of the filter?

The manufacturer’s recommendation is to replace the filter every 24 hours. The mask and attachment are reusable after going through a complete cleaning and disinfection process.

If I want to print the adapter, what settings do you recommend?

In order to maintain the impermeability of the piece it is recommended to use ABS or PETG. Print at the maximum temperature allowed by the material and the lowest layer height.

How safe are these masks?

These masks do not have any type of safety certification or have been tested in laboratory conditions, they are an alternative to the current emergency and the problem of supply of masks


Worldwide volunteers offer 3D printing, masks or materials

Healthcare workers worldwide need help to get snorkeling masks or 3D adaptors printed for their MedSHIELD19 Mask Sets!

Already a great number of volunteers from many countries have contacted us at Custom Surgical and offered to use their 3D printers for healthcare workers in their area.

We have listed our amazing list of volunteers with their contact information below. we can’t thank them enough for their willing involvement and support!

3D print volunteers

If you have a mask you can use and access to HME filters, but do not have a 3D printer, we encourage you to connect with the contacts* below, who offered to use their equipment to PRINT FOR FREE for those medical professionals in their area who need the adaptors.



Luciano Lobato Gregorio
Location: Sao Paulo
Contact e-mail:

Luciano Rafael Papis
Location: Sao Paulo, Escola Castanheiras
Contact e-mail:


Chi-Thanh Hoang
Location: Montreal
Contact e-mail:

Yan Volshteyn
Location: Montreal
Contact e-mail:

Brent Konantz
Location: Winnipeg, MB
Contact e-mail:


Location: Bogotá
Contact e-mail :

Harold Vallejo
Location: Bogotá
Contact e-mail:

Juan Pablo Acosta
Location: Bogotá Barrio Santa Barbara
Contact e-mail:

Oscar Ruiz
Location: Bogotá
Contact e-mail:

Location: La Estrella, Antioquia
Contact e-mail :

Juan Sebastian Arbeláez
Location: Medellín
Contact e-mail :

Luis Trujillo
Location: Medellín
Contact e-mail:

Martín Ortiz
Location: Medellín
Contact e-mail:

Lucas Restrepo
Location: Medellín
Contact e-mail: 

Esteban Satizabal
Location: Cali
Contact e-mail:


Alirio Jimenez
Location: Köln
Contact e-mail:

Federico Acosta
Location: Munich
Contact e-mail:

Location: Munich
Contact e-mail:

Andreas Roehr
Location: Ilmenau, Thüringen
Contact e-mail:

Viktoria & Patrick Oelsberg
Location: Ettringen
Contact e-mail:


Atelier 3D Services
Location: Sangli District. Maharashtra
Contact e-mail:


Location: Jl. Brojomulyo 165A, RT 05/RW 30 Gejayan, Condongcatur, Depok, Sleman, Yogyakarta
Contact e-mail:


Jose Ricardo Mucino
Location: Ciudad Juarez, Chihuahua
Contact e-mail:


Protocas 3D
Location: Castellón
Contact e-mail :

Maskeperro Hacks
Location: Castellón
Contact e-mail:

Location: Ciudad Real
Contact e-mail:


Kanyuk Sergey
Location: Cherkassy
Contact e-mail:


James Torr
Location: Brighton
Contact e-mail:

Daniel Stone
Location: Brighton
Contact e-mail:


Daniel Maciel
Location: South Florida
Contact e-mail:

Andres Bernal (Bioniko)
Location: South Florida
Contact e-mail:

Yohan Rodrigani
Location: South Florida (Miami)
Contact e-mail:

Matt Lonardo

Location: California
Contact e-mail:

Catherine Best
Location: Illinois
Contact e-mail:

Location: Brooklyn, NY
Contact e-mail:

G. Danny Peterson DO
Location: Dept of Anesthesia, University of Missouri
Contact e-mail:

Edmond Ying
ZIP: 07726
Contact e-mail:

If you want to be added to this list to donate 3D printed adaptors to others, please send us an e-mail with your information at or fill the form below and let us know your approximate location, your phone and hours when you can be contacted.

3D print shops online

3D print shops online


People and companies everywhere are innovating with 3D printing for PPE. Those who want to collaborate with us or to share their projects for publishing here are invited to contact us!

3D Projects for PPE from around the world

These projects are available for download and modification at the following GitHub link:

Filip Kober Project

Design dedicated for use with 3M P2/P3 filters or hand/machine made filters

Prakash‌ ‌Lab‌

Separation of inhale and exhales lines adapter


Version of the adaptor to avoid mask condensation

iProyect Mask

3D Printable Mask

Facutly of Polymer Technology in Slovenj Gradec

Design to adapt Cressi Full Face Mask

Roberto Miki HJKB

Project to adapt HJKB mask designed by Roberto Miki

Roberto Miki QingSong

Project to adapt QingSong mask designed by Roberto Miki


Please keep in mind that all projects presented here are not medically graded equipment, but an emergency alternative solution in times where virus protection is vital by any means!

New release from Custom Surgical

ClickNFit for microscope procedures on your smartphone!

MicroREC ClickNFit gives you immediate access to the smartphone’s functionalities that can capture and enhance your microscopic procedures at the same time as performing them, without occupying any oculars.

MicroREC ClickNFit provides extraordinary results in medical imaging for microscopy, based on innovative engineering and high-quality German optics that correct chromatic and spherical aberration.

It can facilitate video recordings up to 4K included when connected with smartphone models that have this camera capability.

Our projects

MicroREC ClickNFit



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