SW8GUU:Made in Japan:NB Linear Systems Nippon Bearing Linear Systems
SW8GUU NB Systems Ball Bushings Linear Motion, 1/2" Bore linear motion ball bushing/bearing, the inner diameter(bore) is 1/2" inch dimensions with a resin retainer series mainly used in the USA, Bearing has 2 Seals, NB brand (Nippon Bearing Linear Systems), made in Japan.