Natural Chemistry Salt Water Magic Monthly Kit smartclean sand crystal water de multiport backwash valves Pool Shape Rectangle Plus Extension Select Option:Blue Pool Shape Rectangle Plus Extension 2' Offset Right Pool Size 16 x 32 + 4 x 8 Shipping Info Usually Ships in 7 10 Business Days Warranty 15 Year Manufacturer Warranty Product Features The polyester bonded thread used in LOOP LOC covers costs almost 10 times more than that used by some of our competitors Aladdin Part # Filbur Part # Filter Bottom Configuration 4" Filter Length 23 1 4" Filter Outer Diameter 8 15 16" Filter Top Configuration 4" Manufacturer Part # APCC7540 Notes Hayward This easy to use monthly kit provides the perfect pool water environment to continually protect the cell from life shortening issues caused by scale Reduces non living organic contamination and calcium phosphate buildup on salt generator cells