... Series – Inch Dimensions, without seals, adjustable clearance,LBB-OP Series – Inch Dimensions, without seals, open typeLBB-UU ... AJ Series – Metric Dimensions, without seals, adjustable clearance,LBD-OP Series – Metric Dimensions, without seals, open typeLBD-UU ... Metric Dimensions, Small Profile, without seals, adjustable clearance,LBE-OP Series – Metric Dimensions, Small Profile, without seals, open ...