10-Pack Flanged Sealed Bearings 5x10x4 Miniature5 x 10 x 4 Flanged Sealed Ball Bearings Lot of 10 Bearings 5 x 10 x 4 Flanged Sealed Ball Bearings, this is a go to bearing size that fits lots of RC cars and trucks or any application that uses this size 5mm x 10mm x 4mm with Flange. Made from high strength chrome steel for durability and performance, each bearing has 2 Seals to protect the bearing from dust or any possible contamination, additionally, these bearings come pre lubricated with grease