Product Name: Aluminum frame Synthetic Fiber Foldaway Panel Filter Type: Filter Elements Usage: Air Filter Material: Polyester Filter Class: G4 Filter Media: Synthetic Fiber frame: Aluminum Trademark: Clean-link Transport Package: Carton Specification: Different size can be customized Origin: China HS Code: 39211990 Product Description 1). The lter medium used is a progressively structured nonwoven made from break-resistant synthetic- organic bers. 2). The frame is made of Aluminum, glued to the pleated lter medium at the four interior sides of the frame in a dust-proof con guration. 3). NO Welded Wire Grid on the media; 4). Large dust holding, small resistance; 5). The moisture-proof may reach 100%; 6). Temp. Resistance: 80º C. 7). Different size can be customized.