The John Deere Z81123 is a genuine OEM grass knife designed for optimal cutting performance on various John Deere mower models. This durable knife ensures efficient and clean cutting, essential for maintaining turf quality. It is compatible with John Deere 7700, 8800, 8700A, 8800A, 8900A, and 8900 mowers, providing a precise fit and reliable operation. With a length of 285.75 mm, width of 63.5 mm, and thickness of 6.35 mm, this knife is engineered to meet original equipment specifications.