The HPS Performance 9/16" high temperature blue silicone cap is specifically designed to be installed onto your cooling system.
Vacuum caps have no reinforcement and are intended for very little pressure and vacuum.
HPS Performance Silicone Caps are reinforced with 3 layers of polyester webbing and will withstand the high pressures and temperatures of your cooling system for years.
They are compatible with coolant, water, air, turbocharger bypass valve ports, vacuum ports, throttle body water ports, heater cores, and much more.
Temperature range: - 65 deg.
F to + 350 deg.
F (177 deg.
C).
Reinforced layer: 3-ply polyester.
Inside diameter: 9/16" (14mm).
Color: blue.
Wall thickness: 4mm.
Inside length: 1-3/16".
Overall length: 1-5/8".
UV and ozone resistant.
Remark: HPS reinforced silicone caps are not compatible with any petroleum-based products, fuel, or oil.