Type: NB Systems Linear Motion Ball Bushing. Size: 4" x 6" x 8 inch. Major dimensions and tolerance (inch).LMB4812NAJ:Made in Japan:NB Linear Systems Nippon Bearing Linear Systems LMB4812NAJ 1/4" Bore linear motion ball bushing/bearing, innerdiameter(bore) is 4" inch dimensions with steel retainer, Bearing is a high accuracy grade linear bushing, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. 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.