At SUMI Guitar Parts, we leverage our experience working in musical instrument stores and building & repairing guitars to offer high-quality products that "clear a certain level of quality." These are bushings to fix the bridge (preventing it from moving back and forth) on Jazzmaster, Jaguar, Mustang, and other guitars. "5 sets (10 bushings)" The dimensions are: 6.5mm diameter on the bridge post side, 8mm diameter on the anchor side, 13mm diameter on the flange, and 1.5mm thickness of the flange. Notes: Some guitars will fit these bushings easily, while others may not fit perfectly (too tight or too loose). If they don't fit, please try the following: If too tight: ・Apply lubricant to the bushings and bridge posts, etc. If too loose: ・Wrap masking tape around the bridge posts, etc. *We cannot address installation issues due to the guitar's inherent precision (individual differences). For example, if there is a significant misalignment between the bridge holes on the pickguard and the guitar body, the flange of the bushing may interfere with the pickguard and prevent proper installation (it may be possible to install it by shaving the flange). *Please be sure to check the dimensions of your guitar's bridge carefully before purchasing. Shipping is free and will be via Yu-Packet (postal delivery with tracking service) only. *To prevent mutual trouble, we cannot accept requests for other shipping methods without tracking services.