BassTec dual coil pickup. It is a passive pickup although it could be used with a preamp (like a Seymour Duncan STC 2p, which I'm also selling). Pickup dimensions are 99.7 x 35.7 x 22.2 mm (3.9 x 1.4 x 0.9 inches). The pickup was originally used in a Schack five string bass. It features blade pole-pieces to provide even coverage regardless of string spacing, and could also be installed in a 4-string bass. The pickup is wired as a humbucker, but has a loop (blue wire) on the back of the pickup to allow for wiring it as a single-coil. Some Schack basses use a push/pull volume pot for switching the pickup coils. Price includes CONUS shipping.