4" O.D. Filters - 4CH-204" O.D. Filters - 4CH-20Availability: 10 in stockSKU: 4CH-20Manufacturer part number: 4CH-20 $19.63 Qty: Add to cart Custom wishlist OKAdd to wishlistAdd to compare listEmail a friendPart Number / SKU: 4CH-20Product: 4" O.D. Filters - 4CH-20Category: Filter Cartridges >> 4" O.D. FiltersProduct tags hot tub parts (7713), 4CH-20 (1)