FIRSTINFO Made in Taiwan Lockable Brake Fluid Bleeder Hose with Check Valve Set Used to bleed brake fluid easily, fastly and safely. Provided with lockable check which is easy to fit the brake nipple of vehicles. Designed with check valve on the hose, which can avoid the backflow of old brake fluid. Suitable range of Brake Nipple: 5.5~8mm Made in Taiwan with high quality.