PVC Vented Soffit 3/8 Sheathing, 1-3/4" - 8' Piece One-piece Soffit Vent designed for soffit board, and may be combined with Starter Strip/Casing Beads or DEFS Casing Beads. Vent Clips are provided to connect Soffit Vent and assist in alignment. Vent area: Caulk all intersections, butt joints, ends and corners at time of installation. Sold by the piece. 8' lengths 50 pieces per box Connector Clips Included 1-3/4" (44 mm) vent area. 7 sq. in. (4,516 sq. mm) of free air flow per linear ft.