... Material:Austentic Grade:304/304L,316/316L,etc. Application:petroleum,Chemical,ect 304 stainless steel elbow 1.grade:304(SUS304, ... 304S31,S30400,1.4301,0Cr18Ni9) stainless steel elbow2.type:seamless ... and Black zp,ChromedSurfaceSurface: 2B, BA, 8K, HL, No.1, No.4, Golden 8K, Black 8K etc.ApplicationPetrochemical industry, ...