Check the listing for details. 4-LITE SWITCHLESS CLUSTER SOCKET TR-604. Condition: New. Listed at 5.92 USD. Phenolic 4-lite switchless socket. These have 3/8" outside diameter nipples (1/8 IPS) top and bottom plus 2-wires 12" long 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. Sockets are bolted to frame. These are for medium-based or "regular" light bulbs. We combine with other items to save shipping. We sell for less in lots of 10- see our store. $5.92 each. Shipping is $5.40 for 1 and $.82 for each additional switch. Combined shipping- to get cheapest shipping costs (when buying different items)please buy what you need (WITHOUT SHOPPING CART) and “request invoice” so we can send invoice with lower shipping costs. SHOPPING CART DOES NOT SEEM TO WORK FOR COMBINED SHIPPING.