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 requirement. 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.