Bolt Circle is approx. 38-3/4″ with 14 Holes on approx. 8-9/16″ Centers. Flange -O.D. is 41-3/4″. O-Ring Center Diameter is 36-1/8″. Approx. 72-3/4″ Overall Height (79″ on 48″ x 48″ shipping pallet). -6″ Foreline with approx. 9-1/2″ Bolt Circle with 8 Holes on approx. 3-5/8″ Centers. 1/4″ dia. O-ring is approx. 8-7/8″ diameter to center. Shipping Wt. with pallet approx. 2050 lb