1/4" Slide Unit Pillow Block (Inch Series), inner diameter(bore)is 1/4" inch dimensions with steel 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: TWA4UU Shaft Support
• Type: Nippon Bearing Linear Systems
• Shaft diameter: 1/4"
• Dynamic Load Rating: 267 N
• Static Load Rating: 356 N
• Made in Japan