Hypertherm Kit:Ht4400 Low Pf Fltr Assy - 128713 by Hypertherm Save -8% $53.98 SKU HYP128713 Hypertherm - SKU HYP128713 Add accessories to hypertherm kit:ht4400 low pf fltr assy - 128713. Close Add Your items total will automatically update after adding options or accessories. You can edit your selections in the cart. Select Options & Accessories Quantity Add to cart