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. $3.67 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 buy what you need and “request invoice”so we can send invoice with lowershipping costs."How to Request Invoice when using shopping cart"---From your eCRATER cart, near the top of the page, move your mouse curser over our name “lamppartsguy” and a drop down menu will appear with the option to request invoice from seller.