This is a genuine Zetor 933439 set of sealing parts designed for the injection pump in Zetor tractors. It ensures proper sealing and reliable operation of the fuel injection system. Compatible with a wide range of Zetor models including the 3320, 3321, 3340, 3341, 4320, 4321, 4340, 4341, 5011, 5012, 5211, 5245, 5320, 5321, 5340, 5341, 6011, 6045, 6211, 6245, 6320, 6321, 6340, 6341, 7011, 7045, 7211, 7245, 7320, 7321, 7340, 7341, 7711, and 7745 series.