LEVEL 34.9mm Alloy Seat Clamp Anodised BlackCNC machined from lightweight 6061 aluminium, the LEVEL seat clamp secures your seat post and looks good whilst doing so. Robust, lightweight and durable, it's designed to fit Ribble framesets with a 31.8mm outer diameter seat tube. Material: CNC machined 6061 aluminiumDiameter: 34.9mmCorrosion resistant anodised finish More info