Red Switch Guard. Made for larger switches available at Lowes. Needs only the switch, a small spring, and either a 2.03mm nail, pin DA002, or a small piece of filament. I do not have a part number for the spring, but it is a 3/8" x 3/4" compression spring available in a Storehouse brand spring assortment. BB016 on Bambu Labs seems to be about the right size.