Cart Continue shopping “20″ B. Wound Polypropylene String Cartridges 5.0 IDIF01D5” has been added to your cart. Product Price Quantity Subtotal × 20" C. Activated Carbon Block Cartridge 5.0 IDIF01B5 $2.35 20" C. Activated Carbon Block Cartridge 5.0 IDIF01B5 quantity $2.35 × 20" B. Wound Polypropylene String Cartridges 5.0 IDIF01D5 $2.55 20" B. Wound Polypropylene String Cartridges 5.0 IDIF01D5 quantity $2.55 Coupon: Apply coupon Update cart Cart totals Subtotal $4.90 Total $4.90 Proceed to checkout