Air filter specification. Filter cap are zinc pleated filter mess white zinc plated filter cap & mesh available in two type of zinc yellow & white. Filter colors are available in two colors dark green & light green. Size:- depth* fold *height. 16*48* 84 element paper grade:- air porosity = 610 ltsec (20mm wg ) paper gsm= 180 +_ 10 mean pore size= 47 (max) microns max pore size = 110 (max) microns burst strenth = 3.5 kgm2best in c;l best in class on international standard meeting all tec requirement for excellent performance.