Choice of Cir-Kit Concepts Terminal Black Blocks or TRANSFORMER: Use with other Cir-kit products to electrify your dollhouse or other mini project. Many hobby and miniature items are very fragile and/or may contain small parts, so adult supervision is always recommended as small parts and pieces could cause a choking hazard. This high quality item is the CIR-KIT Concepts and use these heavy-duty terminal blocks for interconnecting wires of all sizes. Electrical connection exists between opposite screw terminals and one or more wires may be attached to each screw terminal. Choice - Two-pole Terminal Block (CK1049). 1-1/2” TWO-POLE TERMINAL BLACK BLOCK. Or Six-pole Terminal Block (CK1049-2). 3" long TERMINAL BLACK BLOCK. Or Four-pole Terminal (CK1049-1).Sold Already OR TRANSFORMER : Leader Electronic Inc. - Model no A410907OT with output: 9 VAC 700mA - I am not sure about this transformer. It may or may not work with 12volt light for dollhouses. So besure you know what this transformer is used for. I will not be held responsible if you try to use it not knowing. If you purchase more than one items from me, you will need to first add items to your Shopping Cart to purchase multiple items with a single payment. Then I can send one invoice for all items. Please feel free to contact me with questions and/or for more information about payment, shipping and other items that I have for sale. -on self on file cabinet in closet/ blocks are AMG, transforem Karen W.