TWO PACK FILTER MADE IN THE USA NEW IN FACTORY PACKAGING POPULAR BRAND REPLACEMENT: Pleatco: PJW40SC-F2M Unicel: 5CH-402 Filbur: FC-2811 DIMENSIONS : Diameter: 5 1/4" Length: 9 7/8" Top: Handle Bottom: 2" MPT Threaded ( FINE THREADED) Filter Area: 40 sq ft Filter Material: REEMAY (3 oz/yard) USED IN POOL/SPAS MADE BY: SD-00407 6540-723 PJW40-SC Del Sol Spas Jacuzzi Jacuzzi Whirlpool Bath South Pacific Sundance Spas and other manufacturers