This Vibrant 4 Ply Reinforced Silicone Straight Hose Coupling is 2in I.D. x 3in long and is colored black. It is made from 4-ply reinforced silicone and is designed to provide superior strength and reliability in high temperature and high pressure applications. It is ideal for custom cooling and turbo applications as well as radiator and heater core connections. It is also resistant to oil, coolant, and road grime.