This is a clip for an IKEA JANSJÖ lamp for use with 2020 aluminum extrusion, such as the type used on the LulzBot TAZ printers. The design is an adaptation of an existing design for 8020 extrusion. I simply kept the same body, and re-sized the back "mushroom" down to fit. The part is a snug fit when printed in PLA, but should be able to be inserted without need of tools. Seems to be an even tighter fit when printed in ABS, requiring some extra force.Print with me default settings of three shells and 20% infill. Printing with less shells may make the back "mushroom" more flexible and easier to insert, but the part will also be more likely to pop out if positioning the lamp at an extreme angle along the length of the extrusion. Printing in ABS versus PLA also seems to yield a part that is a little more rigid.