Hayward D.E.CX5000BP Platinum Filter Head with Vent Valve Replacement for Hayward Perflex Extended-Cycle D.E. Filter Filter head replacement Fits hayward perflex extended-cycle d.e. filter models ec50ac, i_pfppts, ec50c80x5s and ec40c90, ec50c90 series Made of platinum Include vent valve Weight 5-pound