Detailed Product Description HEPA Filter(vacuum cleaner filter,clean room filter)Features:1) Size: 305x305x50mm, 610 x 610 x 50mm, or 70,80,90mm are available2) Filter Media: Super fine glass fiber3) Frame: aluminum alloy4) Separator: special hot melt5) It match with steel net on both side, so it was beautiful designAny size is available.