Double Die Set Plain Linear Bearing - Steel Shell DDSZ16 1.00" - Round Center FlangeDouble die set plain linear bearing with a 1 ID (inner diameter) and a precision running clearance of 0. 0005 per side in a closed, standard width design. Features a round flange and self lubricating FrelonGOLD liner as standard, which provides optimal performance in extreme conditions such as dirt, heat and vibration. An optional FrelonJ liner is available for harsh chemical environments (use stainless steel shafts for this) and FrelonW is offered as