DETAILS REPLACES THE FOLLOWING CARTRIDGE FILTERS: Alternate Filter Names: 390818 , 4900-481 , 4902-164 , 4CH-935 , 645544001702 , 817-4035 , 817-4035B , PC-0170 , PWW35L THIS FILTER IS USED BY THE FOLLOWING MANUFACTURES Used in pools / spas made by: Waterway Plastics I Nordic Spas FILTER DIMENSION SPECS: Diameter (in inches): 4 15/16" Length (in inches): 9 1/4" Top Hole (in inches): Handle Bottom Hole (in inches): 1 1/2" FEMALE SAE Threaded …