Interstate Pneumatics HSR90-RS4 Rubber Hose Stopper For HSR50, HSR80 and HSR90 Hose Reel Compatible With 1/4" Hose. Solid molded rubber hose bumpers are designed to allow the desired length of hose to be permanently stored outside the hose reel.Two piece rubber hose bumper stop.Suitable for use with Interstate Pneumatic HSR series spring-driven hose reels.This hose bumper cushions the stop on hose rewind and is used in air and water service applications.