You are buying ONE (1) CASE of Polygroup Pool Filter Cartridge A or C Type - 4 Pack 

A CASE CONTAINS FIVE (5) SETS of Polygroup Pool Filter Cartridge A or C Type - 4 Pack FOR A TOTAL OF 20 FILTERS 

Item is IN STOCK and READY TO SHIP - Ships SAME or NEXT Business Day! - NO LONG WAIT TIMES. Ships with TRACKING.

FREE Shipping/Handling within the US!