The Zetor TRD3000300 is a genuine inner brake spring designed for various Zetor UR1 and UR3 series tractors. This essential component ensures proper operation of the brake system. With an outer diameter of 27.5 mm, a length of 95 mm, and a wire diameter of 3.5 mm, it matches the precise specifications required for Zetor models including 5211, 5245, 6211, 6245, 7211, 7245, 7711, 7745, 8011, 8045, 12011, 12045, 16045, 8111, 8145, 10111, 10145, 12111, 12145, 14145, 16145, 8211, 8245, 9211, 9245, 10211, 10245, 11211, 11245, 12211, 12245, 14245, 16245, 3320, 3321, 3340, 3341, 4320, 4321, 4340, 4341, 5320, 5321, 5340, 5341, 6320, 6321, 6340, 6341, 7320, 7321, 7340, 7341, 8441, 9540, 10540, 11441, 12441, 13441, 16245, and 18345.