Plain Linear Bearing Pillow Block P20C 1.25" Closed, CompensatedPlain Linear Bearing Pillow Block, closed shell, with a 1. 25" inner diameter and a compensated running clearance of 0. 0015" per side. A mountable standard sized aluminum housing encloses the bearing, which features a self lubricating FrelonGOLD liner for maintenance free operation in harsh conditions like extreme temperatures, dirt and vibration. Liner options: corrosive resistant FrelonJ & FDA compliant FrelonW Anodized Aluminum Bearing Shell