The Oregon 91436 is a genuine 18-inch (457 mm) standard mower blade designed for Kubota lawn and garden tractors. This high-quality blade features a length of 457.2 mm, a width of 57.15 mm, and a thickness of 3.81 mm. It has a 17.78 mm center hole, two 8.89 mm outer holes with a 63.5 mm center-to-center spacing, and a 25.4 mm lift. It directly replaces Kubota OEM part number K5617-34330 and is compatible with Kubota G21, G2160, G2460G, GR2100, GR2110, and GR2120 models, ensuring optimal cutting performance and durability.