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10 steel/metal 4X10 shielded 4X10X4 vxb ball bearings
10 Bearings Wheel Ball Bearings for many applications, this is a popular size that could be used in many RC Cars and Trucks, or any application that uses this size 4mm x 10mm x 4mm. Bearings are made of Chrome Steel and can rotate up to 85000 rpm, each bearing has 2 metal shields to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.