NSK / Available model :NSK Linear Guides List, NS250580ALW2KCZ1BL NH250880ALN2KCZ1BL PE150270ARK2T04PCT NAH30GMNKCZ1AA NAH30EMNLCT1AA PU120395TRK2PN0 NS201960ALC3PCZNS201960ALC4PCZ NU2220W N1H251440LNNPCZ=30 N1H300920LNNPCZ=20 , SO-23-9229-08AProduct Unit is in Pcs