Double Plain Linear Bearing DFP08C 1/2" Square Flanged End Mount, CompensatedDouble Plain Linear Bearing of 1 2" ID placed inside an aluminum housing with a square flanged end and a bearing inside with a compensated running clearance of 0. 0015" per side. The self lubricating bearing liner is FrelonGOLD which enables linear or rotational movement. Compensated ID running clearance (0. 0015" per side) Double sized with square flange end mount Aluminum housing with a bearing inside Bearing inside has a self lubricating FrelonGOLD