our this Glass firbe machine with PLC controly system , compact with hot melt glue mechine can make the mini-pleast compact in 750mm width, 7PPI or 8 PPI depend on your request. both side with hot melt glue , the air filter efficiency from 99.% to 99.99995% , pleast high is 96 mm. both of the hepa air filter and mini-pleats compact and be supplier.