Outdoor Manager-13T Mountain Bike Cycling Aluminium Rear Derailleur Jockey Wheel Pulley Shimano SRAM Material:CNC 7005 Aluminun Alloy Suitable for the diameter 0.16in,0.2in,0.24in(4mm,5mm or 6mm) Cycle Rear Derailleur 13T Weight:9g Color:Blue,Red,Gold,Silver,Black