Ntn 6218ZZC3 EM Radial Ball Bearing, 6218, Dbl Shield, Non Contact Seal, 90 mm Bore, 160 mm OD, 30 mm Wd 4HM04 Overall Width 19 3 4 in Overall Width 19 3 4 in Wipes Clean of Dirt and Oils Tether Capable Standard Tool (Accessory Needed for Tethering) Ratcheting Configuration Non Ratcheting Tether Style Tether Capable Measurement Type Metric Opening Type Rounded Head Type Offset Handle Type One Piece Box End Type 12 Point Box End Ratcheting No 000 RPM Cage Material Steel Closure Double Shielded Internal Clearance C3 Flange Type Non Flanged Bearing Lubrication Maintenance Free Ball Material Alloy Steel Lubricant Material Mobil Polyrex EM Seal Type Non Contact Shield Material Steel Ring Material Steel Outer Ring Type Straight Maximum Temperature 248 Degrees F Country of Origin Japan (subject to change) Lubricant Material Mobil Polyrex EM