This listing is for a set(4 pieces) of Zu Audio speaker jumpers from Ibis line. I purchased directly from Zu Audio. These are still available on their website for $424.00. I chose spades and banana because I prefer spade connection but wanted banana on one end so my speaker cable spade connection would cohabit the post with banana jumper. These have the oversized spades. Banana ends can be screwed on or off revealing the thread post when removed. I will update the post when I find the original box. From the website Ibis Jumpers are designed to replace the brass jumper straps common to most all dual input loudspeaker binding posts (2 red posts, 2 black posts per loudspeaker). The brass jumpers are there so that you can run single wire input, or remove them and run bi-wire input cables. Those using standard single wire inputs will benefit from replacing the basic brass jumpers with the high conductance Ibis Jumpers. •Oversized spade: 5/16” (8 mm) inside diameter [outside fork width 5/8” (15.9 mm)]. •Banana plug: (ITT-Pomona) fits common banana socket 5/32” - 3/16” (4.0 - 4.7 mm). More info is available online. Let me know if you have any questions.