Sierra 18-3601 Mercruiser Water Intake HoseSierra high quality replacement engine parts are manufactured to meet or exceed OEM requirements.Fits: MC-I, R, MR & Alpha OneSpecifications: Diameter Size: 5/8" or 15.9 mm; Length: 13-7/8" or 352.4 mm; Interchangeable with: GLM; 47120; Mallory; 9-73001; Mercruiser Stern Drive; 32-32461; 32-32461A1;