... This is the inch dimension series with seal used most frequently in UK&USA LM linear bearing: LM3UU,LM4UU,LM5UU,LM6UU ... ,LMB6UU,LMB8UU,LMB10UU,LMB12UU,LMB16UU,LMB24UU,LMB32UU LM Open Series linear bearing: LM10OPUU,LM12OPUU,LM13OPUU,LM16OPUU,LM20OPUU,LM25OPUU, LM3OOPU,LM35OPUU, ... ,LM35GA,LM40GA,LM50GA,LM60GA SDM series Steel cage linear bearing(As same as Ease SDM series): SDM16,SDM20,SDM25,SDM30,SDM35 ...