Four-Bolt Flanged Unit (UCF211-32) - Sparex Part S.18550Sparex Four Bolt Flanged Unit (UCF211 32) S. 18550 This Sparex Four Bolt Flanged Unit is a high quality bearing unit designed for a variety of applications. It features a UCF bearing type with a 2" inner diameter and a 2RS seal type. This unit is compatible with a wide range of machinery and is a reliable replacement for part number 129954. Key Features: Brand: Sparex Bearing Type: UCF Inner Diameter (ins): 2 Seal Type: 2RS Alternative to: 129954