Straight seal ring Outer Diameter: 60.35mm (2.38 ") Inside diameter: 36.6mm (1.45 ") Note this measurement is on the rubber seal, which seals against the YOKE shaft, which is approximately: 38mm in diameter. Thickness: 11.52mm (0.45 ") This box is for the same purpose as E2DZ-7052-A, which separates with or without flange. YOKE = is the short axis which extends from the automatic box and then connects the cardan shaft with a knot cross that transfers the power to the rear axle / wheel.