These are polished gilt complete 2-circuit 3-terminal nite-lite sockets to wire lamps. (It works, for example with a Gone-with-the-Wind hurricane lamp. It lights the top bulb, the bottom, then both, and off.) You get 1 shell, 1 cap, and 1 interior socket. (These are NOT 3-way or off-on sockets- works with nite-lite). Bottom hole is threaded and 3/8"- works with standard 1/8" IPS pipe.We combine with other items to save on shipping. $3.96 each.Shipping is $2.90 for 1 and $.38 for each additional piece.Combined shipping- to get cheapest shipping costs (when buying different items) please buywhat 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.