Brand New .40 size RC Plane foam wing cores. Made by Wing Manufacturing, Galesburg, Il. The invoice says they are YAHOO .40 Wing Core and were originally 30.00. These may work with home built or custom RC planes. There are two sets 4 panels and each panel is 22.25 inches long for a total wingspan of 44.5. Please note these are only the foam cores. Cash Only Pls.