Perfect Size & Wide Compatibility Precisely designed with a 14mm center hole to fit 3/8" ID hose reels and 14mm outer diameter hoses. Ideal for spring-driven air hose reels and auto retractable hose reel systems, serving as a direct and perfect OEM replacement stopper for most standard hose reel setups ✅ Perfect Size & Wide Compatibility Precisely designed with a 14mm center hole to fit 3/8" ID hose reels and 14mm outer diameter hoses. Ideal for spring-driven air hose reels and auto retractable hose reel systems, serving as a direct and perfect OEM replacement stopper for most standard hose reel setups. ✅ Durable Solid Rubber Structure Crafted from premium solid molded rubber, this hose bumper features excellent wear resistance, anti-slip grip and sturdy toughness. It resists deformation under frequent retraction and extension, preventing slipping and loosening to deliver long-lasting stable performance for daily heavy use. ✅ Adjustable Position Limit Function This hose stopper can be freely adjusted and locked at any desired position on the hose. It effectively controls the hose retraction length during automatic rewinding, keeps your preferred hose length outside the reel, and prevents over-retraction, tangling and unnecessary hose damage. ✅ Complete All-in-One Hardware Kit Package includes 2 half-circle stoppers, 2 screws and 42nuts. Comes with all necessary hardware for direct replacement and installation without extra purchases. We offer reliable after-sales service for missing or defective accessories to ensure your shopping experience. ✅ Super Easy 3-Min Installation No professional tools or experience required. Simply position the stopper, insert the screws and fully tighten the nuts. For slightly thinner hoses, firm tightening ensures a tight, non-slip and secure fit, saving your time on installation and maintenance.