[ Metal reinforcing materials in the nature of fittings, namely, flap valves for tanks and fuel oil heating systems, not being parts of machines ]

Pressure measuring safety apparatus in the nature of pressure gauges and pressure reducers for use with oil tanks; oil tank overflow monitoring apparatus in the nature of control and regulating devices for use with liquids and gases; safety alarm for the detection of oil tank leaks; mechanically, pneumatically and electrically operated oil tank content measuring devices, namely, level sensors, control and regulating devices for use with liquids and gases, flexible fuel dipsticks, level indicators and controllers