ARCO Marine is a USA-based manufacturer pioneer in the O/E replacement parts segment and has a name for creating premium quality and part reliability. The 12V SOLENOID (SW450) is one of their products as a switch for power. This solenoid-controlled magnetic field is used as an electromagnet. They are available in direct current (DC) and alternating current (AC). They are a two-way type used in the on /off control of water, petrol, and gas butane propane, controlling a valve electrically. Key Features: Engineer out any part deficiencies to exceed and outlast O/E standards. The warehouse has been tested and proven to provide the lowest failure rates in the marine engine parts industry. Specifications: Brand: ARCO Marine SKU: SW450 UPC: 693006001791 Weight: 1.00 LBS Packaging: 4 terminals, 4 volts. Plungers to fit this must be ordered separately.