SW24GUU NB 1 1/2 inch Seals Ball Bushings Linear MotionSW24GUU Seals on both sides NB Nippon Bearing Linear Systems Made in Japan SW24GUU 1 1 2" Bore linear motion ball bushings bearings, SW24GUU is Seals on both sides, inner diameter(bore) is 1 1 2" inch dimensions with resin retainer, Bearing is a high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. Item: SW24GUU Linear Motion Ball Bushings Type: NB Systems Ball Bushings Linear