Safety and protective devices, namely, hearing protective devices, namely, ear plugs and protective ear muffs; radio headphones; respirators other than for artificial respiration; filters, namely, filters for respirator masks, peel-off lens covers for use with safety, automatic nozzles, exhalation valves for controlling and regulating the flow of gases or liquids, exhalation valve guards for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines, lens replacements, pressure gauges, and pressure relief valves for respirators other than for artificial respiration; dust masks; highway safety cones; warning flags; plastic barricades and warning tape; Back support belts to support worker's backs; protective knee cups to protect worker's knees; kneeling pads to protect worker's knees; face protection shields; protective work gloves with high friction grip; protective heat resistant arm and hand sleeves for industrial and automotive use for protection against heat and sparks; safety aprons, safety hoods for protection against sparks, and protective human head covers for painters; hard hats; brow guards and full face shields for hard hats