Check the listing for details. Upgrade your dbx 3BX-DS 3-Band Dynamic Range Controller w/ Solid Aluminum Knobs. Condition: New. Listed at 19.95 USD. Here's what people who bought this grease say: On August 17, 2023 2013.roo wrote: "Quick delivery, great communication and professional company. All excellent. Works perfect. Thanks" About the knobs: After trying countless knobs, I finally found the perfect-size knob for a dbx 3BX-DS. These knobs have a taper of about 13mm, which makes them perfect for the 3BX-DS. Upgrade your dbx 3BX-DS' worn-out plastic knobs with high-quality aluminum ones. These knobs fit over the 3BX-DS’ extended potentiometer shafts perfectly, and they fit around the panel opening to hide the long-silver shafts. (See pictures 3-4 for size comparison) Kit includes: * 4 Solid Aluminum Knobs* 2 Hex Wrenches: one to remove the old knobs, and the other to install the new ones Feel free to contact me with questions (see last photo of my listing). Please contact me if you need other sizes (see attached photo for phone number). NOTE: Does NOT include dbx 3BX-DS 3-Band Dynamic Range Controller.