Raw material:C65500 /C65100 silicon bronze Ring shanks provide better holding power than ordinary smooth shank nails. Silicon bronze ring shank nails are commonly used in wood boat construction and repair.They will not rust or corrode in marine use. Please choose which you need as follows: 1/2? x 15g 5/8? x 14g 3/4? x 14g 7/8? x 14g 1? x 14g 1-1/4? x 14g 1-1/2? x 14g 3/4? x 12g 1? x 12g 1-1/4? x 12g 1-1/2? x 12g 1-3/4? x 12g 2? x 12g 2-1/2? x 12g 1? x 10g 1-1/4? x 10g 1-1/2? x 10g 1-3/4? x 10g 2? x 10g 2-1/2? x 10g 3? x 10g 2? x 8g 2-1/2? x 8g 3? x 8g 3-1/2? x 8g 4? x 6g Min order:50kgs for each items.