This package includes 1 set of wheels (4wheels) and 8 bearings. Pig Wheels are premium quality skateboard wheels designed for your riding pleasure. These Proline Natural 101A measure 51mm. Bones REDS are manufactured to Bones Skate Rated specifications in a manufacturing facility dedicated to producing the highest quality skate bearings. They are inspected twice before being shipped to skaters and offer the greatest combination of performance, durability and low cost in the industry. Because they offer near Bones Swiss performance at a fraction of the cost, they have become the best selling bearings.