NB TWA24 NB Ball Bushing Block 1 1/2 inch Linear MotionTWA24 NB Pillow Block Slide Unit Nippon Bearing (NB) Linear Systems Made in Japan TWA24 NB 1 1 2" Slide Unit Pillow Block (Inch Series), inner diameter(bore)is 1 1 2" inch dimensions, bearing is a high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. Item: TWA24 NB Shaft Support Type: Nippon Bearing Linear Systems Shaft diameter: 1 1 2" inch Dynamic Load Rating: 6584 N Static Load