See Thru Orange Welding Curtain, 6 ft X 8 ft, Vinyl ORS NASCO Helps improve cutting performance OEM quality Helps improve cutting performance OEM quality and large knurled feed screw knob give easy control of cutting pressure for clean cuts Models 117 and 118 include a self feeding AUTOFEED® cutter wheel that automatically cuts after tightening the knob only once Model 118 features a special knob for easier tightening of the feed screw Filters 100% of far near UV radiation and blue light Arc image dispersed throughout the curtain Puts light back into welding booth For low to high amperage Made from 14 mil transparent vinyl material