• When you measure your round tube, you will need the outside dimension to find your cap in my options. Cap is self adjusting to the inner dimension.
• Caps can handle tube thickness from 0.5 to 1-2mm 
• Made from HARD plastic material, they will provide high wear resistance.

• Size is the cap (also pipe OUTER) size, not the pipe INNER size. Caps are made to flush with the OUTER pipe size.
• Quantity you will receive is same as the quantity chosen in the "pack of" option.
• There can be more than 1 item on the picture in order to show different projection of the item in one picture.