... Price &Quality Short Delivery time Supply Sample! G2, G3 grade air filter, pre-filter, primary filter, washable filter, ... 5: EU3MERV Rating: MERV5, MERV6Media: Synthetic fiber(Nonwoven cloth)Frame: Galvanized Steel, Aluminum alloy, CardboardRated initial pressure drop: ... the character of smallspace,close adhesion fiber and strong frame.Its wroking principle is filtration superficial.No need ...