Kit includes wood block, wheels, hubcaps, two lead-free one-piece axles and four lead-free nail-type axles. Wheels and axles should be the same on all cars in a race.  Block dimensions:  1 3/4" w x 7" l (4.44 cm x 17.7 cm)
Racer shown was made with this PineCar Racer Basic Kit and Dry Transfer Decals -- Hot Rod
About Basic Kits:
Choose from several types of Basic kits. Some kits contain parts to make several cars. Others include weights, custom parts, decals, wheels/axles and/or wood car body blocks/wedges. Metal parts included in Basic kits are lead-free.
All PineCar, PinePro, and Revell wood blocks and accessories are legal for your Official BSA Pinewood Derby race - except the Show Wheels and Titanium Axles. In a sanctioned race all contestants must use the same wheels and axles.
Used with permission, copyright 1997-2016 Woodland Scenics/Tower Hobbies, Inc. Copyright 2016 Brey Corp. t/a Hobby Works.