During your use, they will not harden or crack and can be used for a long time. 【Wide Application】These rubber end caps are widely for covering screws or other threaded parts, PVC tubing, round tubing, cyling, electric wire, furniture feet and so on. Soft and Tough Material]Rubber end caps are made of high-quality PVC material with exquisite workmanship, strong flexibility, high softness, insulation and ductility, waterproof, dustproof, oil-resistant, reusable and long service life 【Soft and Tough Material】Rubber end caps are made of high-quality PVC material with exquisite workmanship, strong flexibility, high softness, insulation and ductility, waterproof, dustproof, oil-resistant, reusable and long service life. For example: the outer diameter of your product is 9., 8mm dia, choose the rubber cover of 9., 5mm! TA-VIGOR 50Pcs Rubber End Caps, 7mm ID Round Flexible Screw Wide Applications: These rubber screw caps are widely used to cover screws or other threaded parts, bicycle, PVC pipe, round pipe, electric wire, furniture feet, etc 【Easy to Use】The rubber end caps are flexible and malleable, so you can easily install them. The rubber end caps are non-toxic and non-polluting, so they can be recycled. 【Reliable Protection】: Our flexible end caps are designed to effectively safeguard your floors from scuffs and scratches. Vinyl Screw Thread Protectors Black TA-VIGOR 50Pcs Rubber End Caps, 7mm ID Round Flexible Screw End Caps Thread Protectors, Black Vinyl Bolt Covers Rubber Covers For Screws, Tubes Flexible End Caps For Tubes And Cables They serve as excellent protective seals for a wide range of applications, including metal chair tips, patio furniture, bench feet, table legs, bar stools, screws or nail heads, and any round tube that requires protection.