Hydraulic rear disc brake caliper system fit for 50cc 70cc 90cc 110cc 125cc quad bike atv, most Chinese made atv with 4-stroke engine, such as: TaoTao Buyang Coolsport Sunl Roketa AIM-EX etc Brake hose length: 1450mm/57''; Caliper mounting hole spacing: 63mm/2.5''; Mounting hole diameter: 7/8'' 22mm. Material: Brake caliper using premium metal, brake oil pipe using heavy duty braided stainless steel Dimension of front disc brake rotor, Outer diameter:158mm/6.22";Inner diameter:48mm/1.88"; Installation pitch:68 mm/2.67",thickness:9 mm/0.35''. Placement on vehicle: front or rear Fit most Chinese made Mini ATV from 50cc to 125cc, such as : TaoTao Buyang Coolsport Sunl Roketa AIM-EX etc. Package includes:1x Left Hand Hydraulic Brake Assembly ( TYPE A Brake Caliper ) + 1 Pair Brake Pad + 1x Brake Rotor + 2x Caliper Mounting Bolt + 4x Brake Rotor Mounting Bolt + 3x Ties (Blue/ Black/ Red colors for your choice) NOTE: There are two types brake caliper with different brake pad, TYPE A and TYPE B, pls check pics and compare it with your old pats carefully before order, thanks. ★Package includes:1Pcs x Rear Hand Brake Assembly(with brake pad installed),1Pcs x Disc Brake Plate, 1 Pair x Extra Spare Brake Pad, 3Pcs x Ties.