This is a pack of ten 8x12x3.5mm rubber sealed "Speed" bearings. ProTek R/C "Speed" bearings are high quality steel/chrome bearings designed for the R/C racing enthusiast.

These 8x12x3.5mm rubber sealed bearings are compatible with a variety of applications. These bearings feature a rubber seal on both sides to provide a greater level of protection against elements. Please check the manual that came with your vehicle for the correct size if you are not certain.