Homebrew helper. For 1 inch diameter autosiphon tube and 5 gallon glass carboy. Helps in keeping the siphon steady and hands free for cleaner transfer to secondary or bottling. The small collar goes onto the autosiphon tube at whatever height you want it to stay. The larger piece snaps onto the neck of the carboy and has a slightly tapered opening so that the collar can find a spot where it stays in place by friction. The holes in the carboy top are air vents. Recommend to print both pieces upside down to minimize supports and to allow easier removal of supports.