This Nuvo Straighten your jSax conversion kit is used to transform your jSax from the classic, curved bell look to a straight design, which may provide more comfort for adult players. The kit comprises a silicone straight neck and bell joint that are easy to affix to the Jsax’s body, and they are supplied in a variety of funky colours to match your instrument. If you do decide that the straight saxophone design is a more comfortable fit for you, these parts will fit neatly inside your jSax case in place of their curved counterparts.