Medium-based porcelain socket that measures: 1 3/4" wide (includes side fitter) and 2 1/8". Socket itself is 1 1/2" wide. This is UL listed and rated 660W and 250V. Fitter has 3/8" threaded hole that works with standard 1/8 IPS pipe. We can combine with other items to save shipping. $3.66each.Shipping is $3.30 for 1 and $.84 for each additional piece.Combined shipping- to get cheapest shipping costs (when buying different items)please buy what you need (WITHOUT SHOPPING CART) and “request invoice” (BEFORE YOU PAY)so we can send invoice with lower shipping costs.SHOPPING CART DOES NOT SEEM TO WORK FOR COMBINED SHIPPING.