Specification: brand new Sponge features: Fully open hole, strong tensile force, high sound absorption performance and good permeability. It is an for ideal product for the production of air filters, stage speaker wire mesh sound-absorbing cotton, oil filters, aquarium filters and other industries. It is also a necessity for the production of ceramic foam filters, filter plates, filter sheets, and filter Sponge performance: Good elasticity, strong pulling force, fast dust filtering speed, high dust filtering rate, low airflow resistance, good ventilation performance, good chemical properties such as drug resistance. It can be washed, and the effect will not deteriorate after washing. Filter cotton has good air permeability and strong mechanical strength, As a filter material, it has the characteristics of low flow resistance and high filtration efficiency. It can be washed repeatedly, showing the advantages of durability, environmental for protection, and economy. Material: sponge Size: approx. 3mm40pp (thick) 2 meters long X 1.5 meters wide 3mm60pp (fine) 2 meters long X 1.5 meters wide 5mm40pp (thick) 1 meter long X 1.5 meters wide 5mm60pp (fine) 1 meter long X 1.5 meters wide (Please allow 3-10cm deviation due to manual measurement or Cutting error, please buy be caution!) Color: Black Package includes: 1pc x Speaker Grill Mesh Cloth Note: Due to the different monitor and light effect, the actual color of the item may be a little different from the color shown in the pictures. Thanks! Please allow 1-3mm measuring deviation due to manual measurement.