Sierra International 18-2758 Marine Exhaust Bellows for Volvo Penta Stern Drive Sierra Exhaust Bellows Meets or exceeds the original equipment quality Sierra part number: 18-2758 Interchangeable with the following: GLM 89020, Mallory 9-72708, Volvo Penta 875848 and 876631 Fit specific, check part numbers to ensure proper fit