Necessary for inflating Polyform U.S. products with a standard tire pump or schrader valve
Creates the seal necessary for proper inflation with a hand pump
Compatible with the following Polyform US products: A Series buoys, LD Series buoys, S Series buoys, CM Series buoys, CC Series buoys, F Series fenders, HTM Series fenders, NF Series fenders, and G Series fenders Size G-3 through G-6