Sierra International 18-15410 V-Belt The Sierra 18-15410 V-Belt is interchangeable with the following: Mallory 9-55004, Mercruiser 57-816544, 57-49043, 57-49043A1, 57-32850, 57-64032, 57-64032A1, 57-64032Q1, Volvo Penta 950813. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra V-Belt Effective length: 41", Top Width: 29-64" Sierra part number: 18-15410 Interchangeable with the following: Mallory 9-55004, Mercruiser 57-816544, 57-49043, 57-49043A1, 57-32850, 57-64032, 57-64032A1, 57-64032Q1, Volvo Penta 950813