Chemical preparations, namely standard turbidity test equipment calibration samples for use in the measurement of turbidity in water

Earphones; Headphones; Loudspeakers; Ear plugs for divers; Non-medical respiratory mask filters; Personal stereos; Portable media players; Protective face masks for the prevention of accident or injury; Protective industrial face masks; Respirators for the prevention of accident or injury; Wireless speakers; Workmen's protective face-shields