Resistance to bad weather and ageing
Good space stability and accuracy,
Good resistance to acid and alkali,
Effectively prevent power outages and leakage.
Perspective panel of sealed box can observe and also can be touched and installed on the airproof surface of the plastic or metal.
On the situation that the body of the trunk is locked, it could also be workable. These clairvoyant panels apply to some special
occasion which needs to be waterproof, dustproof and anticorrosion.