Hypertherm Kit: Current Adjustment Knob - 428226 by Hypertherm Save -8% $20.22 SKU HYP428226 Hypertherm - SKU HYP428226 Add accessories to hypertherm kit: current adjustment knob - 428226. 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