Montreux Machine Head Conversion Bushing set 6.35mm (1/4") NI 9204 I purchased this intending to install it, but I ended up not using it. I am selling it because I no longer need it. I only test-fitted it once into the headstock bushing hole, so the bag has been opened. This is a used item, so please consider purchasing with the understanding that it is non-refundable and non-returnable. It will be shipped via post.