the other nosefrida device was lost and i didnt want to buy another one for $20. so i just redesigned the whole thing. It's much thicker than the "nosefrida replacement cap" so my printer can actually print something useful. it still fits the standard filter but since we lost the original, this one uses 3/8" ID hose to attach. The "mouthpiece" didn't print very well but you dont need it. just print the filter holder and nozzle at 100% infill. i recommend using ABS and post processing with vapor smoothing to get it totally airtight.