The Twist-Off 70 Deep lids match the "Deep" jars, which are sold on Glassmania. The lid has the property that you can see exactly whether the jar has been opened or not. When opening the jar for the first time, you will hear a smallclick. Thisclick is a guarantee that the jar has beenclosed well. This type of lid is suitable both for pasteurisation without back pressure up to 98°C or with back pressure up to 105°C and for sterilisation at standard temperatures between 115 - 121°C. Hot filling without process and subsequent cooling is recommended.