Pair of Knobs and Stems for the Fibre-Metal welding hood with 1CR or 1CP headgear only. This new set of hardware features all 304 Stainless Steel threads to last for years to come. Also included is a high quality Buna O-Ring to hold knob at the tension that you set it to. The designs on our knobs are 100% 3D printed into the knobs, so they won’t wear off or fade.