These bolt covers are made of rubber material, for use. They are easy to install and many applications, including replacement fence railings, steel door stops, pole or wrought iron covers, threaded bolt or nut safety, or any round tube. Features -Color: Black. -Material: Rubber. - Size: 2.00X1.60X1.60cm/0.79X0.63X0.63in - They are perfect for covering screw or other threaded parts. Functions as a thread protector against shocks. - Our flexible end caps work great for preventing scuffs on the floor, as protective seals for metal chair tips. - The rubber caps cushion the threads against damage and will not easily crack or shred like many hard plastic caps. - workmanship, reasonable structure, and professional and practical, can bring you convenience. - Suitable for patio furniture, bench feet, table legs or tips, stools, screw or nail heads, or to cover any round tube. Package list: 60 x Rubber End Caps