Linear Air Diverter-48"x 3.75"-white #4875-48x3.75 Divert drafts from linear air vents. Block hard blowing cold or warm air from ceiling air conditioning vents and registers Stock Widths available: 3.75" Custom widths available up to 11", please call Actual length: 4' = 47.75" .080 gauge high impact polystyrene construction