Quality material: the flexible end cap is made of rubber material, soft and durable, which can last for a long time. You can also cut it into the appropriate length according to your own needs, convenient for your use. Wide application: this rubber cap protector is suitable for fence railings, iron covers, bolt replacement, and screw or nut safety. It can cover any scratches or burrs that may occur during the cutting process. In addition, it can provide protection against injury from pointed rod and tubing edges. Easy to operate: you only need to cut the protective cover to the proper length, then open the opening, and finally adjust it to the appropriate position. It is very convenient to use and can protect you well. Practical design: these bolt rubber caps are designed with classic colors, suitable for use with multiple home accessories. Additionally, they offer different size choices, combined with soft and elastic material, which can also provide effective protection. Color: black Material: rubber Size: 4 kinds of inner diameters: 7mm / 10mm / 12mm / 20mm Package Contents: 80 sets * Protective caps (20 x 7mm protective caps, 20 x 10mm protective caps, 20 x 12mm protective caps, 20 x 20mm protective caps) Only the above package content is included; other products are not included. Note: Light and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allows an error of +/- 1-3cm.