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SMA12GUU NB 12mm Slide Bush Bushings Miniature Motion Linear Bearing Inner Diameter - 170mm SSUCPAS206-19 Stainless Steel Tapped BaseSMA12GUU NB Block Type: Slide Unit Made in Japan: NB Linear Systems Nippon Bearing Linear Systems SMA12GUU NB Block Slide Unit, The inner diameter is 12mm, Bearing is seals on both sides, The retainer material is resin, Bearing is a high accuracy grade linear bushings, Series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. SMA12GUU NB Bearing Linear Ball Bushing Shaft Diameter: 12mm Quantity: 1 Bearing Dynamic load