SFR188ZZ Flanged Stainless Steel Ceramic Hybrid Ball Bearing, Quality is Premium ABEC-5, bearing is closed with 2 Metal Shields, to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease,

• Item: SFR188ZZ Flanged Ball Bearing
• Type: Deep Groove Radial Ball Bearing
• Balls: Si3N4 Ceramic
• Cage: Stainless Steel
• Quality: Premium ABEC-5
• Material: Stainless Steel
• Closures: Double Shielded
• Lubrication: Self Lubricated (Grease) Bearing
• Inner Diameter (ID): 1/4" inch
• Outer Diameter (OD): 1/2" inch
• Width/Height/Bridth (W/H/B): 3/16" inch
• Size: 1/4" x 1/2" x 3/16" inch
• Quantity: One Bearing