Aluminum base. Beautifully made and recommended. This is an outlet pickup purchased for maintenance. I have extras, so I'm putting them up for sale. ※The images are samples. The color of the cable, the appearance of the pole pieces, etc., may differ. If the cable sheath is broken, it may be protected with heat shrink tubing, so please be aware of this. Although it is an unused item, it is an outlet item and may have scratches, dents, rust, chips, peeling, paint lifting, uneven finish, etc., caused during transportation, storage, or manufacturing. Please do not purchase if you are looking for a pristine item. I find it useful because it's inexpensive and reasonably usable. The resistance value varies depending on the lot, so please inquire if you have specific requirements. There will always be errors. Screws and springs are included. Front low power, rear high power, short legs, and four-conductor cable for high versatility. ※Please install the pickup and other parts at your own risk as it is considered a modification. We do not provide after-sales support for wiring. Wiring diagrams and boxes are not included. Regarding the four-conductor cable, the cold wire is connected to the ground, and the tap wires are connected to each other, with the single wire being the hot wire. Sometimes they are connected in parallel, so we check the phase and match it, but if it's different or if you're combining it with other pickups, please adjust the phase before using. As this is an imported product, the purchase price and individual specifications will vary depending on the time of purchase, so the images are samples and the exact same item will not be delivered, and the price will also fluctuate. Please do not purchase if you are concerned about minor details such as "it used to be like this," and we will not accept returns for minor issues unless the item is unusable. The color of the cable, cord, etc., will change from time to time. Please ask questions beforehand and make sure you are satisfied with the item before purchasing, regarding details such as whether the pole pieces protrude from the back, their length, etc. Some adjustable pole pieces are not threaded, so height adjustment can only be done by pushing from the front and back. The specifications of the mounting screw heads (pan head or oval head), length, spring shape, etc., are also constantly changing, so the same items cannot be provided. The mounting ears for the screws may bend during shipping, but they can be bent back, so please correct them yourself before using. Metal will break if bent repeatedly.