HiLo set includes 4 72mm and 4 80mm Wheels, 16 Hybid Ceramic Bearings, 8 8mm Spacers, and 8 6mm Stepped Spacers (You only need 1 set of spacers depending on your skates, we inclue both as a courtesy). This wheel was made for those outdoor hockey players that get tired of burning through their wheels so quickly. The worlds best selling outdoor wheel!!! Created with a brand new abrasion resistant endurance urethane for superior outdoor wear and great grip. Labeda wheels are made in California. Amp Hybrid Ceramic bearings are like stimulants for your wheels. With this bearing you get the precision of ceramic and the durability of steel balls. The single Ceramic ball cleans debris and cools friction allowing for a longer lasting bearing. HiLo set includes 4 72mm and 4 80mm Wheels, 16 Hybid Ceramic Bearings, 8 8mm Spacers, and 8 6mm Stepped Spacers (You only need 1 set of spacers depending on your skates, we inclue both as a courtesy). This wheel was made for those outdoor hockey players that get tired of burning through their wheels so quickly. The worlds best selling outdoor wheel!!! Created with a brand new abrasion resistant endurance urethane for superior outdoor wear and great grip. Labeda wheels are made in California. Amp Hybrid Ceramic bearings are like stimulants for your wheels. With this bearing you get the precision of ceramic and the durability of steel balls. The single Ceramic ball cleans debris and cools friction allowing for a longer lasting bearing.