7 x 13 x 4 Stainless Steel Ball Bearings, Bearings are made of Stainless Steel, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.

• Item: 7 x 13 x 4 Ball Bearings
• Type: Deep Groove Ball Bearings
• Material: Stainless Steel
• Closures: 2 Metal Shields
• Lubrication: Self Lubricated (Grease)
• Size: 7mm x 13mm x 4mm
• Inner Diameter: 7mm
• Outer Diameter: 13mm
• Width: 4mm
• Quantity: 10 Bearings
• Dynamic load rating Cr: 820 N
• Static load rating Cor: 380 N
• Limiting Speed:
  • Grease Lubrication: 47,000 RPM
• Packing: 10 bearings in One plastic tube
• KOYO: WML7013ZZ
• NSK: MR-137ZZS
• NMB: L-1370ZZ
• FITS: THUNDERKING LAGER REAR WHEEL