BreatheAir Yellow 12-Unit Carton #PowerLungSport The resistance controls on this

The resistance controls on this model do not adjust lower to include the resistance of any other models

To see the color of the mouthpiece

Here are some links to Kelly Mouthpieces website where you can get more information on these mouthpieces:

All mouthpieces are made of Lexan so they are easy to clean between uses

BreatheAir Yellow 12-Unit Carton #PowerLungSport The resistance controls on thisThe BreatheAir Yellow 12 Unit Carton contains 12 BreatheAir Yellow model units, packaged together for B2B, distributor, and bulk catalog buyers. Sold as a single carton unit (quantity 1 = 12 physical units). Pricing for this product is managed through your B2B Catalog assignment, not the storefront list price shown here. This product is a B2B only SKU and is not intended for direct to consumer retail sale. BreatheAir Purple is D2C only and does not