The CertainTeed Universal Triple 4 inches Fully Vented Vinyl Soffit is an exterior architectural feature that provides a beautiful finishing touch to any porch ceiling or soffit area. This soffit intake vent is ideal for eave installation only. It also uses nails with 12 inches on center being the faster spacing requirements. Produced using PVC resin, CertainTeed Universal Triple 4 Solid Vinyl Soffit is designed to provide a beautiful finishing touch for porch ceilings and soffit areas.