Features and Benefits:•Works with airless, hot-air, and nitrogen plastic welders.•Square edge profile resists curling during repair process.This Polypropylene flat strip measures 3/8 in. (9.5 mm) x 1/16 in. (1.6 mm). No pigment has been added so it will create a more invisible repair on unpigmented polypropylene parts. Each piece is 1 foot long (30.5 cm) and is sold by the pound. 1 pound contains approximately 115 feet (35 m).