Plain unfinished brass coupling that is 9/16" tall, 5/8" diameter. It has threaded 3/8" hole on one end (works with standard 1/8 IPS pipe) and threaded 1/2" hole on the other end (works with 1/4 IPS pipe). We combine with other items to save shipping costs.$1 each. Shipping is $2.60and $.16 for each additional lot.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.