Tianjin Jinghai Yunda Industry And Trade Co.,Ltd. is a professional manufacturer about water filter elements. Using 100% food grade polypropylene as material, it contains no wetting agents, solvents, antistatic agents or binders; Lower density at the surface of the filter with progressively higher density towards the center. So the surface has a high dirt-holding capability and the inner layer keeps an accurate micron rate to remove small particles. The designs are various which we supplied. Should you are interested in our products, welcome to contact me.