Product Info Catalog Building Materials Walls & Siding Moulding 8'WHT Base Poly Molding 8'WHT Base Poly Molding Request a Quote UPC: 765096852352 Manufacturer: Inteplast Building Products SKU: 227391 Model Number: 61060800032 5/16" 2-3/8" x 8', Crystal White, Pre-Finished Polystyrene Interior Base Molding.