The advantages of vacuum boxes:

1. Aesthetically pleasing and structurally simple.

2. Utilizing watertight hinges and latches.

3. Easy to operate, excellent airtightness performance.

4. Achieves a vacuum level of -0.1 MPa; no leakage for 24 hours.

5. Custom design and manufacturing available according to customer requirements; materials can be stainless steel or carbon steel, with optional vacuum pumps.