No price negotiations. No bulk purchase discounts (shipping discounts). Please refrain from individual negotiations. Please purchase directly without waiting for a response. I aim to ship within 24 hours, so I will not comment until the item is shipped. Thank you for your understanding. *I do not issue receipts. Set of 2, unused. Size: Outer diameter approximately 27.7mm, height approximately 15.5mm. Shaft diameter approximately 6.4mm, uses a 2mm hex wrench to secure the shaft, so it can be used with both USA and Japanese potentiometers. For repairs and customization of vacuum tube amplifiers, stereo amplifiers, antique radios, audio equipment, guitar amplifiers, and effects pedals, as well as for dressing up guitars like those from Teisco and Guyatone. Especially suitable for retro guitars. Images 5 and 6 are for size reference. Image 7 is a reference image for usage. *Guitar is not included. Shipping is by regular mail (no tracking number), so delivery may take some time (even within Kanagawa, it may take 3-4 days). *If you let me know in the comment section before purchasing, I can change to "Click Post" (faster delivery with tracking number) for an additional 50 yen. You can purchase directly without any hesitation. I use recycled materials for packaging.