Snapklik.com : 4" (102mm) ID Hump Silicone Hose High Temperature 4 ply 4 Ply Reinforced 2" ID Hump Hose Straight Coupler Silicone Coolant Vibrant 4 Ply Reinforced Silicone Hump Hose Connector 4.5in I.D. x 3in long (BLACK) 4 Ply Reinforced 3.5" ID Hump Hose Straight Coupler Silicone Turbo Snapklik.com : Ucreative 4 Reinforced Silicone Straight Hump Coupler. Vibrant Performance Aramid Reinforced Silicone Hump Hose Couplers help compensate for expansion, movement and vibration and reduce the chance of your hard pipes becoming disconnected or damaged. Our Hump Hose Couplers feature High Temperature Resistant Aramid Reinforcement Fabric between each layer of silicone which allows for an impressive Operating Temperature Range of 75 Degrees F to 392 Degrees F ( 60 Degrees C to 200 Degrees C). Suitable for Water, Coolant and Air service only. Catalog