Constructed of seamless hemming filters

Constructed of seamless hemming filters：

There have many species of seamless hemming filters,we have a complete set of conventional filters mold.Many times we will asked customers hemming materials used to iron or aluminum.Accounting the cost problem,many customer will select iron instead of aluminum.Because ductility of iron don't as good as aluminum.So the filter is not very beautiful,somewhat elastic don't like molds.If it is sold to the customer's profit is possible,the beast choice of aluminum,this is the standard of conventional filters.Considering the cost,you can choose to have sewn edging,so you can save the cost and aluminum will not waste too mach.