[Introduction] diaphragm made of imported raw materials made of silicone rubber, silicone rubber has excellent heat resistance, cold resistance, dielectric properties, resistance to ozone and atmospheric aging properties, silicone rubber outstanding performance is broad temperature can at -60 ℃ (or lower) the long-term use to + 250 ℃ (or higher temperature). [Features] silicone rubber products based on methyl vinyl silicone rubber-based adhesive, joined by mixing various fillers, book through, filtered, and sulfur, molding, extrusion, bonding and other production processes is made. Small silicone rubber microporous aeration tube, laser drilling, hole uniform and fine, diffuse out of the bubble diameter, and large gas-liquid area, therefore, has a high mass transfer efficiency, high oxygenation efficiency.