Our Heavy-Duty Basic profile bars are laminated which counteracts any tendency to warp, providing economical yet straight and reliable support for medium to large-sized canvases from 24" up to 84″ (~61-214cm). At 1-5/8″ thick, these fully keyable bars are also ideal for large Gallery Wrap canvases. Combined with 3/4" x 3" Heavy-Duty Brace