Seagull bike bottle cage holder. If your bike does not have a hole for a water bottle, this product is for you. It is a product that is very easy to assemble and can be disassembled back. Soft band on the bottom prevents damage to your bike and slips. 2 bolts are included in the package. It fits pipes of all thicknesses as it is a flexible plastic material.All you have to do is tighten the straps and tighten the bolts.