Red Silicone Radiator Hose Kit (MMHOSE-RAM-10DRD) by Mishimoto. Includes: 2 Silicone Coolant Hoses, Mishimoto Lifetime Warranty. Inner Diameter: 1.69in, 1.69in & 2.00in. Outer Diameter: 2.13in, 2.13in & 2.38in. Interior Material: Heat-Resistant Embedded Fibers. Exterior Material: Silicone. Mishimoto silicone radiator hose kits are made with a dual layer combining high grade silicone and heat-resistant embedded fibers to provide efficient heat reduction and increased pressure tolerance, all with an OEM replacement fit!