AccuSharp 4 in 1 Matte Tungsten Carbide Multi Function Sharpening Tool VEL N Manufacturer Part No: 1WC Manufacturer Part No: 1WC Brand Name: Flanders *Thickness: 1 *Electrostatic: No *Filter Class: Class II *Filter Frame Material: Cardboard *Filter Material: Fiberglass *Filters Bacteria: No *Filters Pollen: No *Filters Smoke: No *Filters Viruses: No *High Efficiency: No *Metal Mesh Support: No *Number in Package: 1 *Pleated: No *Product Type: Air Filter *Sub Brand: EZ Flow II *Trimmable: No *Width: 18 *Filters Dust Lint: Yes *Filters Mold Spores: No *Height: 30 *MERV MPR Rating: 1 *Actual Size: 17 7 8 x 29 5 8 x 3 4 *Air Filter Size: 18x30x1 Color: Black Featuring coarse tungsten carbide sharpening blades and fine ceramic rods