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FOURIERS downhill bike guide eco chain guide MTB bike bicycle chain guide Chain Drop Catcher bike part bicycle chain protector Product Features: Perfect for 1x system Plastic top guides & roller Material: Alloy 6061-T6 full CNC made Spec: ISCG, ISCG-05 Range: 32t~40t Weight: 152g Color: Body: S.B Anodized black, red Plastic: Black