The Automatic Opener includes a black piston that is filled with non-toxic oils (hexadecan-1-ol) that reacts to the temperature inside the cold frame. The warmer it gets inside, the oil heats up and causes the piston to expand, opening the lid.
The Automatic Opener includes a black piston that is filled with non-toxic oils (hexadecan-1-ol) that reacts to the temperature inside the cold frame. The warmer it gets inside, the oil heats up and causes the piston to expand, opening the lid.