MRP Mega G4 Alloy Chain Guide 32-36T ISGC-05, Black Installs and adjusts with a single 4mm hex Compatible with 1x7, 1x9, 1x10, and 1x11 drivetrains Integrated nylon skid glides over rocks Includes standard pulley and G-slide slider block for dependable operation in muddy conditions Tracked and grooved upper guide and backplate increases stiffness