... black, yellow zinc, etc.)4materials: Q235 5specification: ASTM A370 6Proven technique &good quality7Packaging: Iron drum, gunny-bag, wooden box,etc. 8We ... License from the Ministry of Railways, P.R.China. 2.From 2006, we have manufactured the products of high speed ... Pictures Certificate Various honorary certificatesProducts (Black 1/2"*10" , Zinc 1/2"*12-1/2" , Black 1/2"*14" ) Round head zinc plated ...