... .size:12*21*30mm Linear bearings LM12UUThese linear recirculating ball bearing and guideway assemblies comprise a carriage with ... guideway and two-piece plastic closing plugs. The four-row linear recirculating ball bearing and guideway assemblies are supplied with initial ... ,LM13UU,LM16UULM20UU,LM25UU,LM30UU,LM35UU,LM40UU,,LM50UU,LM60UU,LM80UU,LM100UU Linear bearings LM12UU