• Includes 50 black rubber caps for thread end protection. • Made of vinyl rubber material, flexible and insulating, ideal for protecting various bolts. • Inner diameter of 6.5 mm with elasticity, suitable for slightly smaller screws. • Easy to use: cut the caps to the desired length, open them and adjust the protective cover to the appropriate position. • Versatile application: perfect for covering screws, threaded parts, round tubes, pipes, hooks, iron rods, cables, and cylinders. • Product dimensions: 7 cm wide, 1.5 cm high, and 10 cm long.