Hypertherm Knob:.82 Dia 1/4 Sft Push-On Blk - 108590 by Hypertherm Save -8% $5.46 SKU HYP108590 Hypertherm - SKU HYP108590 Add accessories to hypertherm knob:.82 dia 1/4 sft push-on blk - 108590. 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