Vibrant Performance Silicone Hump Hose Couplers are hand wrapped and are 4-ply reinforced. They come in your choice of three colors (Black, Red or Blue). Vibrant Performance is the leader in high quality, high performance silicone hoses and couplers in the automotive industry. Their products have earned the trust of racers and engine building professionals throughout the world. They have been proven, over and over again, to perform reliably under extreme temperatures and heavy duty pressure without swelling or bursting.