Silicone Couplers and Hose are hand crafted using the highest quality silicone and every hose is subject to strict quality controls to ensure a flawless product that is free from defects. This silicone hose is manufactured with either a 3-ply or 4-ply polyester reinforcement. 1/2" through 1-7/8" sticks have 3-ply polyester reinforcement, 2" and larger sticks feature 4-ply polyester reinforcement. Capable of withstanding high boost applications as well as temperatures from -76° up to 356° Fahrenheit. Unlike rubber hose, silicone will not spoil with age and is highly resistant to hardening while maintaining very good compression characteristics. These silicone sticks are great for making custom length silicone hose couplers or intake tubes. Silicone Hose Coupler Features: - 4 Ply Polyester Reinforcement (3 or 4 ply depending on size) - -76° up to 356° Fahrenheit Operating Range - Matching inner liner and outer jacket color - Easy to cut - Highly resistant to ozone - Not affected by anti-freeze or anti-rust liquids - Highly resistant to hardening - Very good compression characteristics - Very long life - Reduced maintenance problems - Not suitable for carrying gasoline, oil, or other petroleum products