ST NAILS (1)Raw material:high quality carbon steel 45# or 50# (2)Specifications:ST18,25,32,38,45,50,57,64 (3)Zinc coated:7-10 ST NAILSRaw MaterialHigh quality carbon steel 45# or 50#SpecificationsST18,25,32,38,45,50,57,64HRC48-54Zinc thickness7-10MUPacking 40pcs/line,1000-2000pcs/box ST NAILS