... 3)max height;1000mm 4)foldeded thickness;50mm pleated air filter cartridge1. Features of Standard constructioncellulose/ cellulose + fiber glass synthetic material/ ... with the gasketB. high filtration efficiency , The efficiency should be HEPA class H13 (99.97%)under 40m3/h air folw,it ... comes to 99.9% for 2um~10um,C. filter media material: 100%polyester,spunbondD. produce cycle ;2000pcs/month, ...