Description Bossweld CR39 Cover Lens 51 x 108mm CR39 is a thermoresistant composite resin, protecting the welding filter from spatter, metal & incandescent particles produced as part of the welding process. They do not protect the eyes against impact, flying particles & dangerous rays. (UV/I Features Compliant to Australian Standards CR39 material for longer life Resistant to smoke and spatter known in industry as 1000 hr lenses Applications Replacement ‘front lens’ in standard welding helmet
