50155 universal joint in the 50x155 mm heavy-duty cross-bearing family for KAMAZ and related Russian commercial-vehicle drivelines. The photographed greaseable kit includes one cross with four installed bearing cups, four external circlips, one angled grease fitting and the supplied protective accessory. Search references include 4310-2205025, 255B-2201025, UJ255B, 804707A1C10 and 804707K8C10; confirm the retention style and yoke measurements before ordering.