... bolt(manufacturer) 1.Material:carbon steel 2.Surface:Plain,black etc 3.Use:metallurgy etc 4.ISO90 Item:large size ... black M16 U bolt(manufacturer) Production Description:1MaterialLow-carbon steel ... .8,10.9,12.96StandardDIN,ANSI/ASME,BS,GB,JIS,non-standard7SurfacePlain, zinc plated, black8Colourself-colour, Zinc, Black etc9PaymentTT,30% ...