Although it is designed to fix the filter net with a spring-like wire, the net will come off due to the weight of the paint. Also, in the frame to attach the net, there is a botch for fixing the net, it is a specification that hooks the net to it and it does not slip down the net, but this too can not bear the weight of the paint and the net will run out. In fact, was it a commercialization using it? Doubt. It is not durable to use.