9 x 14 8.1. KBK50 NB Square Flanged Type:Slide Unit Made in Japan:NB Linear Systems KBK50 NB Square Flanged Type Bearing, the inner diameter is 50mm, Series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. D X x Y x Z mm tolerance mm tolerance 50 2-13 75 0-22 100 112 88 13 94 9 x 14 8.1 Pack#KBK50-NB.This item is in the category "Business, Office & Industrial\Industrial Automation & Motion Controls\Mechanical Power Transmission\Bearings & Bushings\Bearing & Bushing Parts\Other Bearing & Bushing Parts". The seller is "irvineman" and is located in this country: US. This item can be shipped worldwide.