Lamp parts: These are phenolic 3-lite switchless socket that can be wired for chandelier. These have 3/8" outside diameter nipples top and bottom plus 8" 2-wires coming out the nipple. Overall height (including nipples) is 5"- 3" wide and 3 5/8" tall (excluding nipples).These are rated 660W and 250V. We sell in lots of 10 for less, but you'd need to buy from that listing- see our store.We combine with other items to save shipping. We sell for less in lots of 10- see our store.$5.42 each.Shipping is $3.86for1 and $.82 for each additional switch.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.