We do not sell a reusable or autoclavable mouthpiece for any of our spirometers.

However, A-M Systems does sell such a product. The part number is 164200. This is a Blue Thermoplastic Mouthpiece. It has an ID of 1 and 1/4″

The website for this product can be found at:

https://www.a-msystems.com/p-521-reusable-mouthpieces.aspx

These mouthpieces work well on both of our spirometers.

These are the Go Direct^® Spirometer (GDX-SPR) and the Spirometer (SPR-BTA)