Atom Boom SLIM 59x38mm FIRM 86A White and Pink Hybrid Roller Skate Derby Wheels (4-pack) PACKAGING: Sold in 4 Packs. Order 2 for a pair of skates. SURFACES: Sport Court, Concrete, and Wood Floor TECHNOLOGY: BOOM THANE Formula HARDNESS: HYBRID - FIRM (86A) SIZE: 59x38mm COLOR: White / Pink