One bearing Stainless Steel Ceramic Balls ABEC-5 quality, this is a popular size that could be used in many application that uses this size 15x 28x 7  Bearings can rotate up to 100,000 rpm, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.

• Item Type: Double Sealed Ball Bearings ABEC-5
• Item Name: S6902-2RS = 61902-2RS1
• Size: 15mm x 28mm x 7mm
• Type: Deep groove radial ball bearings
• Material: Stainless Steel
• Balls: ZrO2 Ceramic (Zirconium Oxide)
• Closures: Rubber Seals
• Lubrication: Self Lubricated (Grease)
• Quantity: One Bearing
• Marking: S6902RS = 61902RS1