Hope MM4/MM6 Phenolic Caliper Piston - Hydraulic Brake Replacement Valve Length_Med 41-55mm making it suitable for an

making it suitable for an array of e-bike setups

this kit enables you to keep your Hope V-Twin hydraulic brake system performing at its peak

making them a smart investment for dedicated cyclists

Water-resistant for up to 80 minutes

Hope MM4/MM6 Phenolic Caliper Piston - Hydraulic Brake Replacement Valve Length_Med 41-55mm making it suitable for anUpgrade Your Hope Hydraulic Brake Calipers with the Hope MM4 Small MM6 Large Phenolic Caliper Piston Sold Individually Optimize your Hope hydraulic disc brake system with the high performance Hope MM4 Small MM6 Large Phenolic Caliper Piston. Designed for precise service and maintenance, this high quality replacement piston ensures optimal brake performance, durability, and reliability across various Hope caliper models. Materials & Engineering