9 Electro-optical instruments for use in inspection and measurement of industrial components; Electronic and optical communications instruments and components, namely, optical transmitters; Electronic testing equipment, namely, telecommunication line integrity testing apparatus; Length measuring gauges; Measuring rules; Micrometer screws; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Recording and playing devices for sound and image carriers; Spectrograph apparatus; Tool measuring instruments