Features 1,This is a aftermarket product with good quality 2,It is a left front brake master cylinder 3,Fit for 7/8 inch handlebar(approx. 22mm) 4,The bolt size is M10 x 1.25mm 5,ATV part for POLARIS SPORTSMAN 400 500 550 600 700 800 Specification Features: This is a aftermarket product with good quality. It is a left front brake master cylinder. Fit for 7/8 inch handlebar(approx. 22mm). The bolt size is M10 x 1.25mm. ATV part for POLARIS SPORTSMAN 400 500 550 600 700 800. Specifications: Condition: Color: Black Bolt Size: M10 x 1.25mm Position: Front, Left Applicable Vehicle: ATV Application: Fit For 7/8 inch Handlebar(approx. 22mm) Fitment: For POLARIS SPORTSMAN 400 500 550 600 700 800 Package Weight: approx. 688g Here is How to install Lever as your reference : Add Brake Fluid into the Reservoir, and it Requires DOT-3 fluid. Check the Master Cylinder, Push the Piston in and out to remove the air. Connected the Oil Hose, Air will enter the Lines and it must be removed. Hold and Relax the lever again and again,to push the air out. Please Note: Our Master Cylinder Lever is sets, and not includes the Brake Fluid. Use the Universal M10 x 1.25 Oil Hose. Installing a Master Cylinder Lever requires dedicated expertise or persons. Please take the new parts to the Motorcycle repair shop or advised from the dedicated persons. In the vast majority of cases, the Lever have no pressure, due to the Air fill with the Oil Hose or Master Cylinder when installed. The compression efficiency of the Air is larger than the brake fluid, So, if don't remove the Air from the Oil Hose or Master Cylinder, then you will feel holding NO pressure on the lever. Package List