Size and fit - Rubber caps for round pipes, screws or cylindrical objects with a diameter of 0.18-0.19 inch (4.5-4.7 mm). They fit flush on the surface of the body. The set includes 10 sizes to meet protection needs for objects of different sizes. Material and benefits - Made of vinyl rubber, these bolt caps are wear resistant and help extend the life of screws. They provide dustproof, protective, decorative and insulating finishes. Application and compatibility - Threaded protection caps are suitable for all kinds of hardware threads, screws, cylinder threads, round pipes, round rods, wires, hooks, decorations, household appliances, handles and more. Installation instructions - Cut the protective cover to the correct length, open the opening, and place the cover in the correct position. Easy to install, small in size, lightweight and portable. Use scenarios - Protect exposed screw heads on furniture or equipment to improve longevity and appearance. - Cap ends of outdoor round pipes or rails to keep dust out and prevent corrosion. - Finish and protect handles, hooks or decorative hardware on appliances and decor.