10-Pack 693ZZ 3x8mm Shielded on Both Sides 3x8x4mm Miniature Bearing693ZZ Shielded Wheel Ball Bearing Lot of 10 Bearings 693ZZ Shielded Wheel Ball Bearing, this is a go to bearing size that fits lots of RC cars and trucks, Made from high strength chrome steel for durability and performance, each Comes with double metal shields (ZZ) to keep out dust and dirt, additionally, these bearings come pre lubricated with grease for smooth operation. 693ZZ Ball Bearings Deep Groove Ball Bearings Shield Double Metal Shields for