10 PCS R134a AC High & Low Pressure Port Caps, High-temperature Resistant Rust-proof AC Charging Port Caps, Plastic Repair Valve Protective Covers with Rubber Seal, for R134a Cars (Blue & Red)

1.Thick rubber gaskets closely fit valve nozzles to block moisture infiltration and stop leakage. Engineering plastic resists high heat and variable ambient temperature, resisting cracking, whitening and distortion under long-term hood installation.2.Vertical and dense anti-slip stripes cover outer walls of caps. Users complete disassembly and tightening manually without extra tools, and stable twisting performance stays unchanged even under damp engine bay surroundings.3.Engraved H/L marks on cap tops distinguish high and low pressure ports to avoid mismatched installation. Each pack contains five high-pressure red caps and five low-pressure blue caps for neat storage and wide replacement on most R134a vehicles.

• Design: Features a red-and-blue color with H and L characters engraved on the top surface. The red marking indicates the high-pressure filling port, while the blue marking indicates the low-pressure filling port, allowing for quick identification of port connections.
• Material: Made from engineering plastic, it withstands high temperatures in the engine compartment and seasonal temperature fluctuations. Long-term installation in the engine bay prevents brittleness, whitening or deformation, suitable for harsh engine bay conditions.
• Anti-slip: The outer surface of the cap features vertical ridges and fine circular anti-slip grooves. It can be tightened or removed by hand without tools such as wrenches. It does not slip when turned in damp engine compartments, making routine replacement simple.
• Sealing: The cap features a thickened rubber sealing gasket inside that presses tightly against the valve stem end face when tightened. This prevents moisture and condensation from seeping into the valve core gaps, avoiding slow leaks caused by valve core.
• Specifications: A set includes 5 high-pressure red caps and 5 low-pressure blue caps. The set of high-and-low-pressure components is for easy storage and to prevent mix-ups. Suitable replacement for original factory caps on R134a refrigerant vehicles, making installation easily.