Bones Reds are high-quality bearings at an affordable price. They come pre-lubricated with Bones Speed Cream racing lubricant, and are designed specifically for smoothness and speed when skating. These bearings fit 7mm wheels (vintage and artistic skates), and a 16-pack is enough bearings for a full 8 quad skate wheels.
Note: You probably want 8mm bearings unless you know specifically that your skate has 7mm axles. The vast majority of new skates (Sure-Grip, Riedell, Moxi, etc.) have 8mm axles.