The Flex Technologies 4.5" x 6" Cold Side Air Intake Hose is manufactured with high quality materials for maximum durability and longevity. It features 321 stainless steel restraint rings for reduced swelling and increased hoop strength. The hose is reinforced with 4-ply silicone aramid for superior strength and flexibility. It is also ozone and UV resistant and has a temperature range of -65 °F to 350 °F. With its superior construction and design, this hose is sure to provide reliable performance. FleetPride is your First Click in Heavy Duty®.