LBD50UU NB 50mm Slide Bush Ball Linear Motion BearingLBD50UU Type Seals on Both Sides: Slide Bush Made in Japan: NB Linear Systems Nippon Bearing Linear Systems 50mm Linear Slide Bush, Retainer material is resin, it is Seals on Both Sides, bearing is a high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. Item: LBD50UU Bearing Type: Linear Slide Bush Number of Ball Circuits: 6 Retainer Material: Resin Quantity: One Bearing Dynamic