Description: Ball Bearings 6902 15mm x 28mm x 7mm 6902-2RS Bearing 15x28x7 Si3N4 Ceramic:Stainless:Sealed:ABEC-3 Spinergy Xaero ROAD REAR ABEC-3 Ball Bearing 15x28x7 Stainless Steel Ceramic Balls (Si3N4 Silicon Nitride) A high quality ball bearing Stainless Steel Ceramic Balls ABEC-3 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, Bearings are packed 10 bearings in one plastic tube. Item Type: Double Sealed Ball Bearings ABEC-3 Item Name: S6902-2RS = 61902-2RS1 Size: 15mm x 28mm x 7mm Type: Deep groove radial ball bearings Material: Stainless Steel Balls: Si3N4 Ceramic (Silicon Nitride) Closures: Rubber Seals Lubrication: Self Lubricated (Grease) Quantity: One Bearing Marking: S6902RS = 61902RS1 Pack#7376