CE,SGS,ROHS can be met Dual-core Digital Vernier Caliper with IP54 Measuring Function: ID, OD, depth, Height, Step ... can be met)Materail: high quality carbon steel or stainless steelSurface Treatment: the whole rod body with heat treatment, measuring surface ... position; high quality and large LCD display make it easy to readMeasuring Function: ID, OD, depth, Height, Step.Quality Control: CE,ROHS,SGS ...