I am selling these 3D printed 3M Respirator valve port block filter caps.

This cap will block one of the ports on your 3M mask (6200 6500 6800 7500).

This way you can conserve the filters you might already have.

It is recommended that you use saran wrap in conjunction with this cap to maximize its effectiveness.

Condition is New.

Shipped with USPS First Class Package.

The color comes in black.

Thank you for looking at this listing. I wish you all the best.