12X30X9-2RS rubber Sealed Ball Bearing, the inner diameter is 12mm, outer diameter is 30mm and the width is 9mm, Bearing is made of Chrome Steel, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease,

• Item: 12X30X9-2RS Ball Bearing
• Type: Deep Groove Ball Bearing
• Material: Chrome Steel
• Closures: Rubber Seals
• Lubrication: Self Lubricated (Grease)
• Dimensions: 12mm x 30mm x 9mm/Metric
• ID (inner diameter)/Bore: 12mm
• OD (outer diameter): 30mm
• Width/Height/thickness: 9mm
• Size: 10 x 30 x 9 mm
• Quantity: One Bearing
• Dynamic load rating Cr: 5,100 N
• Static load rating Cor: 2,390 N
• Limiting Speed:
  • Grease Lubrication: 16,000 RPM
  • Oil Speed: 29,000 RPM