This is a pack of ten 5x8x2.5mm Rubber Sealed Flanged "Speed" Ball Bearings. ProTek R/C "Speed" bearings are high quality steel/chrome bearings designed for the R/C racing enthusiast.
These 5x8x2.5mm bearings are used in a variety of applications. Please check the manual that came with your vehicle for the correct size if you are not certain.
