Product Price Quantity Subtotal Watts Standard Carbon Block 5 Micron Filter Cartridge 2.5" x 10". $21.50 Watts Standard Carbon Block 5 Micron Filter Cartridge 2.5" x 10". quantity $21.50 Hardness and Iron Test Kit $69.00 Hardness and Iron Test Kit quantity $69.00 Coupon: Apply coupon Update cart Cart totals Subtotal $90.50 Tax $6.34 Total $96.84 Continue Shopping Proceed to checkout