welding helmets and parts therefore; welding hand shields; glass sold as a component of welding hand shields; face shields; welding electrodes; spectacles; eyeglasses lenses; eyeglass frames and parts therefore; protective helmets; sand blast helmets and face shields; safety goggles; industrial protective helmets; safety equipment for use in reduction of noise levels, namely, ear plugs not for medical use; safety masks for protection of face, throat and neck against flying particles, fumes, chemical splash and dust, and face shields