The Oregon 90977 Gator G3 mower blade is a premium aftermarket solution designed for John Deere mowers, offering superior mulching and bagging performance. This blade measures 434.18 mm (17-3/32 inches) in length, 63.5 mm (2.5 inches) in width, and has a thickness of 5.08 mm (0.200 inches). It features a 17.48 mm (11/16 inch) center hole and two 9.53 mm (3/8 inch) outer holes, with a center-to-center spacing of 63.5 mm (2.5 inches). The Gator G3 design provides improved lift and cutting efficiency, making it an excellent replacement for OEM part number M145476.