ITEM NAME:Mini 10mm Motorcycle Durable Rear Brake Master Cylinder For Chinese ATV Dirtbike Description: This is a Hydraulic foot rear brake Master Cylinder for 50cc-125cc ATVs. Runs well and is quick to install. Help control the rear brake caliper. Universal style rear master cylinder, it may also use on dirt bikes. Activation arm can be removed and original arm used if necessary. Specification: Material: metal Color: black+silver Size(approx): 92.5*40*50*10mm Banjo Bolt: 0.4''(10mm) Package:&;nbsp; 1 pc x rear brake master cylinder Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 1-2 cm differences due to manual measurement..Size(approx): 92.5 40 50 10mm. Banjo Bolt: 0.4"(10mm). This is a Hydraulic foot rear brake Master Cylinder for 50cc-125cc ATVs. 1 pc x rear brake master cylinder. Universal style rear master cylinder, it may also use on dirt bikes.