15~60ppi colourful pu foam 1.Polyurethane foam materials, Eco-friendly, 2. Open cells, excellent air permeability DeacriptionDustproof filter categories: cabinet, exhaust fan, vacuum cleaner, refrigerator, freezer, speaker, television, Luminaire, camera, projector, mobile phone, satellite receiver,new wind equipment, heater, mining and rock cutting equipment, smelting’manufacturingMOQ:500/PCS ...