Linear bearing. Good service. High precision and low noise. Strong abrasion capability. Linear bearing Linear bearing Series:Linear bushing bearings: LM, LM..U, LM..L, LM..LUU, LMK, LM..AJ, LMF, LMF..L, LMH, LMH..L, LMFC, KH ect.Linear housing units: SMA, SMA..L, SME, SME..L, TBRShaft supports: SK, SHFSupport rail: SBR, SA, STBRLM: Standard LMS: Corrosion resistance GA: Steel cage UU: Both sides ...