Teflon Washers TT 0365-05 x 6 Since these are mass-produced items, image ① is reused. Use these to reduce stiffness during tuning adjustments. *Musical instrument not included. Used on a Spirit (image ②, example of use) It's a standard modification, and it made it a little easier to turn. *I'm using washers from a manufacturer that seemed to work well based on research online. These are not "specialized products" from a guitar parts manufacturer. Please note that this is just a reference, as there may be individual differences in instruments. I don't think there will be any problems, but I haven't confirmed if they can be used on all other Steinberger series instruments. [Shipping] They will be placed in a plastic bag like image ③ and shipped via anonymous delivery, delivered to your mailbox. Although they are new, there may be minor scratches or dimensional differences. Please understand. ■Instant purchase without comments is welcome. ■No price reductions. ■No returns to prevent swapping. ■No claims, no returns. *Please see my profile for other precautions.