1Double braking with four pistons can directly transfer the oil pressure to the brake block stable and make the brake transmission more efficient. 2Integrated cylinder design, strong sealing, reduce maintenance times, lightweight design. 3Single, double finger brake handle, flexible control, antislip surface particles, antislip do not release. 422.2mm/0.87in is basically suitable for the installation of models on the market. 5Brake handle oil pump stroke can be adjusted to control pump oil amount and stroke. Item Type: Hydraulic Disc Brake Calipers Material: Aluminum Alloy Color: Black Weight: Approx.687g/24.2oz Style: 1 x Pair of Four Oil Brakes (Rear Left, Front Right) Tubing: Front Tubing Length: Approx. 800mm/31.5in, Rear Tubing Length: Approx. 1400mm/55.1in Product Application: Approx. 160mm/6.3in Disc 1 x Pairof Hydraulic Disc Brake Calipers 4 x Screw