Trombone Rubber Bumper ★ These are round rubber bumpers often attached to the slide ends of German-style trombones. Large: 1, gray (with some black discoloration) Small: 4, black * Sold only as a set. I ordered these as replacement parts several years ago, but they are unused, so I will sell them. * Please note that the slide end shape/slide decoration may not allow these to be attached depending on the instrument. There is no other way to confirm this than to check the actual parts. Also, returns/cancellations are not accepted.