This high-quality spring bushing is a perfect replacement for your worn-out or damaged OEM part number 680-322-01-50. With a 20mm inner diameter, 2-1/4" outer diameter, and 4" length, it is compatible with a variety of Freightliner models. The interchange part numbers include RB233, MR668, SP46-52800, RB-211, RB-233, 680 322 01 50, S-15348, SP46-52800ATR, 16-17769-000, AUTMR712, and MR668UB. This spring bushing does not come with any warranty, but you can trust its durability and performance.