As an initial efficient filter, the Washable Panel Filter features light panel structure composed of the repeatedly used aluminum alloy framework, filtering materials, and reinforced bars. It can be tailor-made to the cleanable folding or non-folding panel filter per client, for the former one, 46mm and 96mm aluminum materials are optional; the latter has three options, i.e. 21mm, 23mm, and 24mm. In addition, the client can choose either aluminum or plastic corner.