Audio transformer, tube driver, interstage, for single ended tube amplifiers. Hammond items are not stocked but ordered as we get orders and are usually drop shipped via U.P.S. directly from Hammond in Buffalo NY. For specs and details about this product please go to https://www.hammfg.com. If you would like to order a specific Hammond part number and you don't see it on our website just send us an email and we can let you know price and availability. If you do not want your items drop shipped please let us know.