According to the insulation board thickness, the  insulation fixging nails has various of specification. This is the sizes our factory can  do 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 90mm, 100mm, 120mm,140mm, 160mm,200mm. This is all the size we can do now, also our factory accept customization. If you have drawing, we can also open new moulds as you need.