SMS16W Stainless Steel Miniature Slide Bush Anticorrosion Double Wide Made in Japan:NB Linear Systems Nippon Bearing Miniature Linear Systems 16mm Stainless Steel Anticorrosion Double Wide Miniature Linear Slide Bush, SMS16W bearing is a high accuracy grade Miniature linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan.