SMSF30GUUE NB Slide Bush Ball Bushings 30mm Linear Motion BearingsSMSF30GUUE NB Round Flange With Pilot End Type Anticorrosion Made in Japan: NB Linear Systems SMSF30GUUE NB Round Flange Type With Pilot End Type, The retainer material is resin, Bearing is anticorrosion, Bearing is seals on both,series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), Made in Japan. Item: SMSF30GUUE NB Bearing Type: Linear Slide Bush Retainer Material: resin Quantity: One Bearing Dynamic load rating Cr: 1570 N Static