Yet another little gadget for leftover filaments! With 100% infill it's less then 9 gramms.The bottom nut socket is just 10.5 mm wide - it is intentional so you have to warm up the UNC nut and push it into the tight socket.If you would like to print the yellow knob as well it is the part of the GoPro dive handle v2 design: https://www.youmagine.com/designs/gopro-diver-s-handle-v2