1.factory directly sell 2.washable,recyclable,durable,eco-friendly 3.OEM available 4.can pass specifical authentication 1. air filter sponge,air filter sponge,air-condition filter sponge,aquarium filter sponge can be widely used in daily life and industry2. Used in communication equipment, home appliances, automotive industry, air-conditioner industry, hardware industry,medical equipment industry ...