Chỉ báo thước đo cuộn filament cho PLA 1.75mm

This filament spool gauge/indicator gives you a rough idea of how much filament you have left to work with. The hanging loop is a 50mm diameter whole which is fairly typical of most spools. You can hang this on the spindle with your spool, look through the window and get an idea of how much length or weight you have left of 1.75mm PLA. Inspired by David Hilter's original design. Makes for a nice 2 or 3 color print. One color up to the cut grooves, a middle color, and the text being a third color.