NB SMSF12W 12mm Slide Bush Miniature Bushings Linear Motion Bearing Inner Diameter - 1 1/8 inch (1.125") Closures: 6 Bearings with 2

Closures: 6 Bearings with 2 metal shields & 8 Open Bearings

Dual rubber seals keep out dirt and moisture

5 Shielded Ball Bearings

material is Chrome Steel

NB SMSF12W 12mm Slide Bush Miniature Bushings Linear Motion Bearing Inner Diameter - 1 1/8 inch (1.125") Closures: 6 Bearings with 2SMSF12W Round Flange Double Wide Anticorrosion Slide Bush Made in Japan: NB Linear Systems Nippon Bearing Miniature Linear Systems SMSF12W Round Flange Double Wide Anticorrosion Miniature Linear Slide Bush, The retainer material is steel, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), Made in Japan. SMSF12W Bearing Linear Miniature Slide Bush Retainer Material: Steel Quantity: 1 Bearing Dynamic load rating Cr: 510 N Static