Silver lamp part kits enable you to turn almost any bottle into an electric lamp. (You need to make sure rubber adapter will work with the size of your bottle opening.) These pre-wired kits come with 8 ' silver cord, push-thru nickel plated socket, 1" rubber adapter, 1 1/2" steel nipple, check ring and knurl nut. We ship with other items to save shipping costs. $7.21 each. Shipping is $3.70 for one and $.66 for each additional kit.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.