roofing nail our HDG roofing nails have thickness galvanize covering,it can be well 60 hours at salt spray test. SIZE:3/4''-2''SURFACE TRATMENT:EG,HDGFLAT HEADSMOOTH SHANK OR RING SHANKPACKAGE:50LBS/CTN,25KG/CTN,30LBS/PAIL,5LBS/BOX,1LB/BOXADVANTAGE:WE ARE THE BIGGEST NAIL MANUFACTURE IN CHINA AND OUR GOODS ARE POPULAR WITH CUSTOMER BECAUSE OF GOOD QUALITY roofing nail