The CertaForm Flatwork Form System provides an adjustable solution for forming long slab edges, multi-tiered stairs, and other complex projects without needing to trim lumber or plastic forms--saving time and eliminating job site waste. Available in both 2 x 6-inch and 2 x 4-inch profiles, the forms are reusable PVC that can be easily drilled, nailed, and staked like standard forming lumber. The 2 x 4 adjustable form features a second 12-foot form that nests inside the first form and can be slid out to 23 feet. North American Specialty Products. WOC Booth S11854