Polished nickel completeoff/on pull-chainsolid brass socket, shell, cap to wire your lamps. These have shells with uno threads andpull-chain interior socket- cap has a set-screw to tighten to pipe. The cap has 3/8" threaded hole to screw onto standard 1/8 steel pipe. Rated 660W, 250V. It is stamped "made in China". These work with "standard" or "medium-based" light bulbs.We combine with other items to save freight. $6.88 each.Shipping is $2.80 plus $.34 for each additional socket.Combined shipping- to get cheapest shipping costs (when buying different items)please buy what you need (WITHOUT SHOPPING CART) and “request invoice” (BEFORE YOU PAY)so we can send invoice with lower shipping costs.SHOPPING CART DOES NOT SEEM TO WORK FOR COMBINED SHIPPING.