1.Spec: ST18,25,32,38,45,50 2.Zinc thickness: 7-40um concrete steel nail 1.Specification: ST18,25,32,38,45,452.Zinc thickness: 7-10um3.Features: Design innovation,unique adhesive tape,non-friable off,great environmental value.It is an practical 4. new products.The tape strips is environmental protection and safety. concrete steel nail