Extender enables you to use all handlebar accessories on seat posts. fits for bags, backpacks and baskets. easy mounting with stainless strap for ø 25-32mm. handlebar adapter head included. ideal on bikes without carrier, allowing you to click on bigger bags, backpacks or baskets (depending on the amount of space on your bike).- We don't advise the use on carbon- or other lightweight seatposts or recommend to take advice from the manufacturerSpecifications:Composition:- Weight: 230 g