Thermometer bung suitable for many brands of early stills, Essencia Express, Still Spirits 25 Litre Pot/Reflux/Super Reflux, Still Spirits 20 Litre Thermoplastic Pot/Reflux/Super Reflux, Duplast (Copper Dome Head) 25/28 and 50 Litre.
Has a tapering hole drilled specifically for holding a thermometer in place. Does not fit an airlock
