Duraline Rubber Molded Lighting Systems provide safe overhead temporary lighting and easy to use task lighting. All Duraline String lights are molded to heavy duty type SOOW 600 volt cable in solid rubber. Lamps are sealed by a rubber “O” ring molded into each socket on all of Duraline’s Lighting Systems. This “O” ring forms a watertight seal around the neck of each bulb eliminating problems associated with oil, dirt and moisture. These sockets include a heavy-duty, internal crush-proof ring around the screw shell, an external grounding ring and a molded-in, heavy-duty hanging grommet. Socket bodies are molded of durable rubber, and each socket is integrally molded to type SOOW cable. All products are molded to heavy duty 600 volt SOOW cable in solid Rubber Flame Retardant and UV Stabilized.