DVBPSM Vent Block Foam Plug, Foam, For: Lawrence, Vent-Air, Norwesco Vents, 1/PR
X 7-1/2 in. pieces that have been pre-attached for easier handling and installation. Vent Type Vent Plug. Product Type Vent Plug. Shape Square. Screen Included No. Material Polystyrene. Hazardous Material No.