Black Silicone Radiator Hose Kit by Mishimoto. Includes: 13 Silicone Hoses. Inner Diameter: Hose 1, 2, 3 - 0.30in, Hose 4 - 1.32in, Hose 5 - 1.21in & 0.81in, Hose 6 - 1.16in & 1.33in, Hose 7 - 0.68in & 0.95in, Hose 8, 9 - 0.30in, Hose 10 - 1.25in, Hose 11 - 0.83in & 0.95in, Hose 12 - 0.68in, Hose 13 - 0.68in & 0.84. Outer Diameter: Hose 1, 2, 3 - 0.70in,Hose 4 - 1.72in, Hose 5 - 1.61in & 1.21in, Hose 6 - 1.56in & 1.73in, Hose 7 - 1.08in & 1.35in, Hose 8, 9 - 0.70in, Hose 10 - 1.65in, Hose 11 - 1.23in & 1.35in, Hose 12 - 1.08in, Hose 13 - 1.08in & 1.24. 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!