Solid brass uno-threaded3-way socket ableto operate a 3-way bulb. Complete 3-piece socket that has bottom cap with 3/8" threaded hole (works with 1/8 IPS pipe). This has small set screw that tightens to pipe. We combine with other items to save freight. $5.59 each.Shipping is $3.10 plus $.38 for each additional socket.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 lower shipping 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.,RcmdId ViewItemDescV4,RlogId p4%60bo7%60jtb9%3Fuk.rp*a4%601gc%3E-13fccb8bde4-0xf0-->
