Mr. Tuffy tire liners help stop flat tires from thorns or glass. This is the extra heavy-duty liner from Mr. Tuffy, built to handle the higher speed of ebikes, in the size to fit Pace 350, Pace 500, and Level ebikes. 

These strips are installed in between the tire and the inner tube to form a puncture-resistant barrier. 

Qty "1" = set of 2 strips (enough for one bike).