Inner Ring, Bore Diameter 3/4 in, Compatible Bearing Grainger Part Number 35TW77, 35TX29, 35TX65, 35TZ23, 779K38, 779K90, 779K91, 779KG6, 779KH2, Compatible Bearing Manufacturer Part Number 1610, 16101, 1612, 16121, Outside Diameter 1 in, Overall Width 0.765 in, Ring Material Alloy Steel, System of Measurement Inch, Bore Diameter Tolerance +0/-0.0005 in, Lubrication Openings None, Outside Diameter Tolerance +0/-0.0005 in, Ring Material Grade Su2