Marine Seaboard. Mercury Gray. 54" x 96" x 1/4". Provides superior performance where water, UV exposure, and other harsh elements are present. Unlike wood or metal alternatives, our marine building materials will not rust, corrode, rot, delaminate, or splinter. With superior scratch resistance, stiffness, and packages, this seaboard is ideal for outdoor cabinetry, marine furniture, signage and recreational applications. - OVERSIZE FREIGHT! This item is considered oversize. The freight quote you see in your shopping cart may not be accurate. You will be called or emailed with an actual quote before your order is proc essed if freight will be different than the online quote.