Coils, electric; Commutators; Electricity conduits; Electronic controllers used to reduce power consumption; Gasometers; Headphones; Junction boxes; Rectifiers; Refractometers; Switch boxes; Switches, electric; Tool measuring instruments; Electric circuit closers; Electric connectors; Electric resistors; Electrical plugs and sockets; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for unde...