The Big Box Roller Blades Deck deck rides on Jacuzzi Unlimited's 8.5 x 32.2 EX7 shape. A mellow concave/ steep kick keeps the board lively and flickable for technical skating. Epoxy 7 Construction. 7-ply 100% North American Maple with Epoxy Glue. Individually Pressed. 8.5 x 32.2 WB: 14.25. Mellow concave/ Steep Kick. Stronger than industry 7-ply. Strong pop. Long deck life.