The Zetor 78275066 is an authentic OEM cylinder liner, precisely engineered for Zetor UR1 and UR3 series engines. This critical engine component features a 90mm inner diameter, 95mm outer diameter, 170mm length, and a 100mm flange diameter. It is designed to maintain optimal engine compression and performance across a wide range of Zetor tractor models, including the 5211, 6211, 7211, 7711, 5320, 6320, and 7320 series.