M.L. Condon offers architectural, marine and aircraft plywood with A-grade hardwood veneer faces and cores, designed for interior applications. Lumber core, MDF and flake cores also are available in select popular sizes. Choose from 4x8-ft. sheets in thicknesses ranging from 1/4 in. to 1 in. Birch, cherry, mahogany and red oak finishes also are available in 3/4x4x10-in. sheets. Exterior plywood also is available. (914) 946-4111, CondonLumber.net.