The 9/16" high temperature reinforced red silicone cap from HPS Performance is specifically designed for installation onto your cooling system.
Vacuum caps are intended for very little pressure and have no reinforcement.
HPS Performance Silicone Caps are reinforced with 3 layers of polyester webbing and will withstand high temperatures and pressures in 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 more.
Temperature range: - 65 deg.
F to + 350 deg.
F (177 deg.
C).
Reinforced layer: 3-ply polyester.
Inside diameter: 9/16" (14mm).
Color: red.
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 fuel, oil, or any petroleum-based products.