No price negotiations. No bulk purchase discounts. Please refrain from individual negotiations. You can buy directly without a comment asking for permission. I try to ship within 24 hours, so I will not comment until the item is shipped. Thank you for your understanding. Set of 4 Unused, purchased from the USA. * There are scratches on the silver parts. L size '70s retro black/silver plastic knobs. These knobs use a slotted screw to fix the shaft, so they can be used with both USA and Japanese potentiometers. The size is approximately 29mm outer diameter of the hat part, approximately 14.6mm minimum outer diameter of the black knob part, and approximately 17.8mm height. Use for repairs and customization of vacuum tube amplifiers, tube amplifiers, stereos, antique radios, audio equipment, guitar amplifiers, and effectors, as well as for dressing up bizarre guitars. The image in the 5th photo is a size reference image; the item is in the center. Sets with different quantities are also available. Shipping is by regular mail (no tracking number), so it may take some time for delivery (even in Kanagawa and surrounding areas, it may take 3-4 days). * If you let me know in the comment section before purchasing, I can change to "Click Post" with faster delivery and a tracking number for an additional 50 yen. Recycled materials are used for packaging.