Made of high quality aluminium alloy. Lightweight and durable. Non-slip texture for easy installation. . Available for 34.9mm seatposts Mass strap on the clamp so you can use brass welds on the front mechanics on any frame without having to use brass welds on the mount. Road bikes, mountain bikes, folding bikes, bicycles, etc. Specifications. Material: aluminium alloy Colour:Black Size: Diameter: 34.9 mm / 1.37 in Package includes: 1 piece front derailleur chainstay clamp Caution. Due to manual measurement Please allow 1-3mm error due to manual measurements and differences in light and screen, item colour may vary slightly from the picture. Please understand. Please ensure that you do not mind before ordering.