Ring gear (number of teeth: 18/44pcs) compatibil: URSUS 2802, 2812, 3502, 3512, 3514, 5312, 5314; MASSEY FERGUSON 16, 135, 148, 155, 158, 165, 168, 1715, 175, 178, 185, 188, 1230, 1240, 1250, 20, 25