Mishimoto MMHOSE-F250D-99BL Ford 7.3L Powerstroke Silicone Coolant Hose Kit, 1999-2000, Blue Direct fit for the 19992001 Ford 7.3L Powerstroke INNER DIAMETER: HOSE 1 1.70" & 2.00" HOSE 2 1.70" OUTER DIAMETER: HOSE 1: 2.00" & 2.30 HOSE 2: 2.20" High grade silicone and heat-resistant embedded fibers feature max temp of 330F Mishimoto Lifetime Warranty Interior material: Heat-resistant embedded fibers Exterior material: Silicone Maximum temperature: 330 degree fahrenheit Fits 00-03 Ford Excursion, 99-03 Ford F-250 Super Duty, F-350 Super Duty, F-450 Super Duty and F-550 Super Duty