Backflow prevention system - Precision check valve stops backflow and air ingress, ensuring an optimal seal and increased reliability for precise brake fluid control during maintenance. Transparent vent hose design - Versatile vent hose with universal vehicle compatibility, clear fluid observation, and effective venting for hoses and couplings during maintenance. Sealed and rust-resistant - Excellent sealing prevents leaks in the vent hose. Rust-resistant material with a flexible construction and a robust aluminum housing ensure long service life. Easy handling - Plug-and-play connections simplify clutch bleeding on motorcycles, saving valuable time during maintenance. Use scenarios - Motorcycle clutch bleeding: Connect to the clutch hydraulic line, observe the fluid in the transparent hose, and maintain a tight seal to prevent air ingress and leaks during the bleed. - Car or light vehicle brake fluid maintenance: Use for brake fluid bleeding and system venting across compatible vehicles, enabling clear observation and reliable sealing during maintenance. - General hydraulic line venting and couplings: Suitable for venting hoses and couplings in various vehicles, providing universal compatibility and straightforward handling for maintenance tasks.