Keyless phenolic socket (no outer threads). These are black, 2 1/4" tall and will accomodate a standard bulb.The bottom hole is threaded 3/8" and will work with standard 1/8 IPS pipe. Rated 650W and 250V. We combine with other items to save shipping. We sell for less in lots of 20- see our store.$2.58 each.Shipping is $3.12 plus $.43 for each additional piece.Combined shipping- to get cheapest shipping costs (when buying different items) "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.
