Features: Porcelain Pull-Chain Sockets Medium base (E26), sometimes referred to as standard or Edison base Much more durable and longer lasting than phenolic interiors Great for restoring and repairing lamps that suffer from heat build-up Rated 250 volts - 250 watts U.L. and CSA Listed Your choice of chain finish: Antique Finish Polished and Lacquered Finish Porcelain Pull-Chain Socket Interiors. For manufacturing or repairing lamps that suffer from heat build-up. 250V-250W, U.L. & CSA listed. Your Choice of Metal Finish on Pull-Chain: Antique Brass Finish Chain Polished & Lacq. Brass Finish Chain Nickel Finish Chain