1.made in stainless steel, carbon steel, and other alloy, strengthen polypropylene, etc. 2.low pressure reducing ,flux is great Detailed IntroductionWe are specialized in supplying pall ring in Stainless steel, carbon steel,aluminum,bronze,304L,316L,and other alloy, carbon seep aluminium.Strengthen polypropylene, strengthen nylon6, strengthen nylon66, strengthening PBT. Material for Pall ring can ...