Sierra International 18-2732-9 Water Shutter - Pack of 2 Sierra Water Shutter Meets or exceeds the original equipment quality Sierra part number: 18-2732-9 Interchangeable with the following: GLM 89170, Mallory 9-42802, Mercruiser 807166A3, 14348A1, 14348, 14348A2 Length: 6.125"; Width: 2.360"