LMB 04 UU 6.35mmx12.7mmx19.05mm

Plastic Cage, 0.25 inch Bore, 0.5 inch Outside Diameter, 0.75 inch Long

LMB 06UU 9.525mmx15.875mmx22.225mm Japan

LMB 06UU, LMB Series, Compact Ball Bushings, Linear Motion Bearings. LMB-6