Features: Integrated molding oil cylinder. The brake lever has been. Oil, no oil filling is required for the first use, and can be installed directly, only after the oil is used up, it needs to be filled with oil. The brake lever has been filled with oil. Do not Press the brake lever before or during the installation process, which will cause oil leakage, otherwise it needs to be refilled mineral oil.The brake lever can only be press after the brake is fully installed. The oil in the brake lever will flow into the caliper through the oil pip. He mold block (brake pad protection block) inside the caliper should not be removed before the brake is installed. When not fully installed, if the mold block is removed, the piston will shift, which may cause oil leakage or the brake piston may not rebound in place. This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Brakes". The seller is "carbonbicycle" and is located in this country: CN. This item can be shipped to all countries in Europe, Australia.