The Cooper Wiring Devices 604-SP Medium Base Lamp Holder is made of high-strength porcelain and mounts on 4-inch outlet boxes with breakout for 3.25-inch box mounting. This lamp holder features a keyless design and includes a ball chain, 3-inch cord, connector, end bell and dust ring to protect against plaster and dirt. This lamp holder comes in a white finish and is rated for 660-watts and 250-volts. The Cooper Wiring Devices 604-SP Medium Base Lamp Holder with Pull Chain comes with a 2-year limited warranty to protect against defects in material and workmanship. Cooper Wiring Devices offers innovative wiring solutions that increase productivity, energy efficiency and safety on the jobsite and at home. Their expansive offering includes code compliant devices for single and multi-family homes or residential development projects. Cooper Wiring Devices has been a trusted name in electrical products for over 175-years and is headquartered in Peachtree, GA and has international manufacturing and distribution facilities.