7-ply 100% North American Maple with Super Sap Resin Glue. Super Sap is the strongest eco-friendly resin formulated with recycled biobased rewnewable raw materials. Super Sap construction reduces energy use, emssions, and environmental impact. Packaged in a 100% compostable bag. Measures 8.0" x 31.6" with a 14" wheelbase and Mellow Concave.