Sold as a pack of 4 wheels. A full eight-wheel setup requires two packs. Made in the USA. Max uses full 42 mm width for grip and stability. Mid narrows to 38 mm for greater lateral response. Low combines 59 mm diameter and 38 mm width for acceleration and lateral response. Hardness by color: Purple - 89A: 89A; Black - 92A: 92A; Red - 95A: 95A; Green - 98A: 98A. Photos show an example variant. Select your size or color where offered; confirm stock with Diamond.