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 secure the bridge (preventing front-to-back movement) on Jazzmaster, Jaguar, Mustang, and similar guitars. "2 sets (4 bushings)" The dimensions are: 6.5mm diameter for the bridge post side, 8mm diameter for the anchor side, 13mm diameter for the flange, and 1.5mm thickness for the flange. Important Notes: Some guitars will fit these bushings perfectly, while others may not fit quite right (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 be responsible for installation issues due to the guitar's own precision (individual variations). For example, if there is a significant misalignment between the bridge holes on the pickguard and the guitar body, the bushing flange may interfere with the pickguard and prevent proper installation (installation may be possible by shaving the flange). * Please be sure to carefully check the dimensions of your guitar's bridge before purchasing. Shipping is free and will be via Yu-Packet (delivery to your mailbox with tracking service) only. * To prevent any issues for both parties, we cannot accept requests for other shipping methods that do not have a tracking service.