ITEM NAME:Aluminum Alloy+Nylon Chain Guide 31.8-35mm Lightweight Protector Road Bike Description: Use ultralight high-strength AL7075 Aluminium Alloy with high quality CNC machined. It can be used on the tube in the frame to effectively prevent the chain and chain from jumping. It needs to be small and light, and it must be strong and durable, so we use a solid aluminum alloy as material with high hardness and long service life. Novel hollow design, reduce weight, anti-chain effect is good, used for single-disc sprocket, make riding smoother and easier. More compatible, the original frame of the tube 35 diameter convertible to a diameter of 31.8 after installation. Specification: Material: 7075 Aluminum Alloy CNC + Nylon Specification: Æ35mm~31.8mm/ E type mount Package Includes: 1 Piece Chain Guide 4 Pieces Washers 1 Piece Frame Protector Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. SKU: DMO0010055354041412.Use ultralight high-strength AL7075 Aluminium Alloy with high quality CNC machined. Material: 7075 Aluminum Alloy CNC + Nylon. It needs to be small and light, and it must be strong and durable, so we use a solid aluminum alloy as material with high hardness and long service life.