Universal - suitable for 30mm outside diameter round pipes, battens and profiles. If you are not sure about the size, please refer to our product images for correct measurement. UNIVERSAL USE: Whether it's sun, rain or snow, our square end plugs will withstand all weather conditions without a problem. The plastic cover is made of UV resistant and strong PP material, perfect for indoor and outdoor use. Wide range of uses: Our plastic end plugs can be used with steel tubes, aluminum tubes, chairs, tables and other furniture - they are absolutely reliable in every field of application. SPACE SAVING Brackets: Each plug has at least three safety slats pressed against the inner wall so the plug is fully and securely attached to your pipe. Installation is very simple and can be performed without tools. Color: Black Material: PP Package Contents: 20 x round pipe plug Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3cm.