This is an original Zetor 55010221 hydraulic pump seal, designed for reliable performance in Zetor tractors. With an inner diameter of 45 mm, an outer diameter of 65 mm, and a thickness of 10 mm, this sealing ring ensures a secure fit and prevents leaks in the hydraulic pump system. It is compatible with various Zetor tractor models, including the 8011, 8045, 10011, 10045, 10111, 10145, 11111, 11145, 11211, 11245, 12011, 12045, 12111, 12145, 12211, 12245, 14145, 14245, 16045, 16145, and 16245 series.