1.Type:tank manhole cover 2.Material:SUS304,316L,etc. 3.Size:300mm-500mm 4.Max pressure:0.4MPa ... 5.HACCP,ISO9001:2000,QS-9000 ss304,316L stainless steel tank manhole cover Commodityss304,316L stainless steel tank manhole cover Materialss304,304L ... ,316,316L,etc.Carried standardGB,SH,HGJ,ISO,ANSI ...