Product Specifications Audible pressure-relief alarm activates at 6 psi Easy-on/easy-off lid provides positive seal, no gasket required Jar permanently etched, large print minimum/maximum water level marking that are easy to read and will not rub or wash off Soft plastic diffuser resists clogging due to mineral build up from water Large, quad wing nut for a secure connection Disposable, single-use and latex-free