Vevor Hepa Filter Replacement Pleated Air Filter 24x24x11.5in Galvanized Frame HEPA Filtration System Galvanized Frame Deep-pleat Filter Purify the Air Compact Structure Wide Application Filter Life: 6-12 Months,Model: VV-AF-2424,Item Size(L x W x D): 24 x 24 x 11.5 in/ 610 x 610 x 297 mm,Frame Material: Galvanized,Filtration Efficiency: 99.97 %(