Full Complement Si3N4 Ceramic Bearing With Inner Diameter Three Quarters Inch Outer Diameter One And Five Eighths Inch And Width Seven Sixteenths Inch Made From Silicon Nitride Ceramic For High Precision Low Friction Performance 696ZZ It uses chrome steel races

It uses chrome steel races and rubber seals to protect internal parts from dust and moisture

hardened steel rod measures 16 mm in diameter and 30 inches long

Glass balls offer excellent corrosion resistance and low rolling resistance

20 bearings Inline skate bearings from the 608-2RS family

Full Complement Si3N4 Ceramic Bearing With Inner Diameter Three Quarters Inch Outer Diameter One And Five Eighths Inch And Width Seven Sixteenths Inch Made From Silicon Nitride Ceramic For High Precision Low Friction Performance 696ZZ It uses chrome steel racesR12 Full Ceramic Si3N4 Bearing 3 4 x 1 5 8 x 7 16 in Inner 3 4 in, outer 1 5 8 in, width 7 16 in; 1 pc ceramic R12 is a full complement silicon nitride ceramic bearing designed for precise motion in equipment where light weight, corrosion resistance, and low friction matter. Typical uses include lab instruments, precision drives, and small CNC guides. Inner diameter: 3 4 in (19. 05 mm); Outer diameter: 1 5 8 in (41. 28 mm); Width: 7 16 in (11. 11 mm)