Inner Diameter: 16 mm Outer Diameter: 28 mm Width: 7 mm Brand new, genuine Volvo Penta Oil Seal. This is a factory original equipment part, not aftermarket. Fits: Suits Volvo Penta Engines: 2003T, MD21A, MD30, MD31, MD40, MD41, KAD42A, KAMD42A, KAMDD3, KAMD300.