Pile O' Bones Complete Skateboard (Natural Concave, Mini (7.5" x 29")) DECK - Constructed of 7 plies of 100% American/Canadian Maple (wood species- Acer Saccharum) with skateboard specific glue made by Franklin. The boards are cold pressed and allowed to cure for 7 days before finishing, resulting in a stronger deck more resistant to cracking. WHEELS - High grade T.D.I.( toluene diisocyanate) polyurethane that offers good rebound and great abrasion resistance. This is a proprietary formula and a great all around wheel. It measures 54 mm in diameter with a hardness is 99a durometer, and results in a ride that is comfortable throughout the wheel's long life. TRUCKS (What the wheels are attached to) - Mass street truck 5.0, All around street truck. Axle width 7.7 which gives the rider a stable and safe ride. BEARINGS - 'Black & Blue' ABEC 7 bearings size 608. Chrome steel precision bearings with nylon ball retainer for skateboard specific application. One removable black rubber shield and one crimped metal shield. The result is an easier and more precise ride. PREMIUM PERFORATED GRIP TAPE - in standard 80-90 grit keeps the rider from slipping off even under wet conditions. Truck mounting hardware. Phillips. All black. Heat treated and matches the high quality of the rest of the board.