20x30x3 MERV 13 Air Filter Compatible with Zephyr VGF Series 20x30x3 Whole Home Deep Pleated Return Air Grille Filter, MERV 13 Air Filtration System Specification: ?MERV 13 Efficiency ?Wire-backed synthetic media ?High wet strength beverage board frame ?Open cell foam gasketing with adhesive ?10-12 Pleats per foot of filter face area Features: ?Fits most 1” Return Air Grilles without modification ?Lower static pressure than 1" MERV 8 filters to save energy ?Foam gasket ensures complete seal with no air bypass ?Lasts up to 6 months or longer ?Valuable price Package Includes: 20x30x3 MERV 13 Air Filter x 1