Guardrail bolts 1.Good quality,competitve price. 2.color:silver grey 3.product grade: A surface treatment:HDGMaterial:Q195 Q235 35# 45#Good quality, honesty price. This product is widely used in architectural decoration ,chemical equipment, medical equipment , electric power equipment, machine equipment, light industries, etc Advantages:As a best -seller product, have a great number of advantages ...