The Kubota RA21121700 track roller assembly is a genuine OEM component designed for optimal performance in Kubota mini excavators. This essential undercarriage part ensures smooth track operation and durability. It is compatible with various models including the KX016-4, KX018-4, U15, U17, U17-3, U17-3α, U17-3α (GL), and U17-3α (HG). With a weight of 5.1 kg and dimensions of 200 mm length, 110 mm width, and 170 mm height, this track roller is built to Kubota's high standards for reliable service life.