... parts with high quality approvedNSF61,WRAS,KTW,W270,FDA,ACS,ULColor:blackMaterial:siliconeperformance:good high/low temperature,aging resistance, ... good electrical properties,color stability.certification:NSF61,KTW,ACS,W270,FDA,ULquality standard:ISO9001:2008,ISO/TS 16949: ... ,German DVGW,American ASTM,ISO3302-1(G.B./T3672-2002),Japan JIS/P.G.,8D,PPAP,5Squality document:size report, ...