This is a genuine Zetor 64131004 gear, featuring 31 teeth. Designed for various Zetor tractor models, this original equipment manufacturer (OEM) part ensures optimal performance and durability. Key dimensions include an outer diameter of 129 mm, an inner diameter of 38 mm, and a width of 26 mm. It is compatible with Zetor 5211, 5245, 6211, 6245, 7211, 7245, 7711, 7745, 3320, 3321, 3340, 3341, 4320, 4321, 4340, 4341, 5320, 5321, 5340, 5341, 6320, 6321, 6340, 6341, 7320, 7321, 7340, and 7341 series tractors.