NSA KITHP20PV 20 cal PureView Arc Flash Head Protection Kit You don’t have to deal with heavy, bulky, and uncomfortable arc flash head protection anymore. The 20 cal PureView™ arc flash faceshield kit is lightweight, comfortable, and comes with all you need for complete arc flash head protection. Also available in a 12 cal option, this arc flash kit includes an arc rated balaclava, arc rated faceshield, hard hat, and safety glasses.