[Pack of 2 bar end plugs outer diameter 24 mm inner diameter 16mm expanding adjustable lock type fit for inside diameter more than 17 mm handlebar Made of rubber aluminum and sponge durable and lightweight 22 g 1 pair Looks Good & Easy To Install，8 color for choice compatiable with all you type handlebar tape and bike grip DO NOT OVER TIGHTEN THE BOLTS These don’t need to be super tight just snug enough to not fall out over bumps and drops. Tighten the screw with a 3mm allen wrench to expand and stay in place Suitable for for Most Bicycle Road Bike Mountain Bike Folding bike MTB BMX Fixie]