With quicker brake engagement and shorter free stroke, the Shimano BL-M4100 disc brake lever delivers intuitive braking so you can stay focused on the trail ahead. The BL-M4100 disc brake lever is compatible with both the BR-MT410 and BR-MT420 brake calipers and will make for a nice upgrade to your existing brake set. Details: Model No: BL-M4100 Series: Deore M4100 Mount: Clamp band I-SPEC EV compatible Compatibility: Brake Caliper: BR-MT410 2-piston, BR-MT420 4-piston Brake hose: SM-BH59-JK-SS (for BR-MT410), SM-BH90-SS (for BR-MT420) Oil: Shimano Hydraulic Mineral Oil