ITEM NAME:5 PCS MF84zz (4x8x3 mm) Flange Metal Double Shielded Ball Bearing 4*8*3 Fla C6R2 5 PCS MF84zz (4x8x3 mm) Flange Metal Double Shielded Ball Bearing 4*8*3 Fla C6R2 100% waterproof Qty: 5 Pcs Material: Bearing steel Usable With: All RC Cars, Heli, and Planes such as TAMIYA / KYOSHO / TRAXXAS / HPI / ALIGN / TEAM LOSI Usable With: And other electronic appliances ID (Inner Diameter): 4mm OD (Outer Diameter): 8mm Thickness: 3mm Closures: 2 Metal Shields Lubrication: Self Lubricated with Grease Package Contents: 5 x Ball Bearing Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.