1. Made of quality aluminum alloy and premium plastic, lightweight, sturdy and durable. 2. Hard plastic made insert fits most bikes perfectly, anti-slip and firm. 3. Tighten the screw to make the plastic insert expand to plug the handlebar. 4. Easy to install and remove. 5. Screw specifications: M4 x 30mm hex

http://olla.gr/toseek-1-pair-mountain-bike-handlebar-grips-caps-end-plug-aluminum-alloy-bicycle-bar-ends-plug-purple-toseek/