DIN125A,DIN7989,DIN126,DIN9021 are available size from M3 to M42,1/4" to 1" black finish,zinc plated and hot-dip galvanized 1)raw material: q235,q1952)size: from M3 to M42,1/4" to 1"3)finish:black,zinc plated,hot-dip galvanized4)loading port:Shanghai or Ningbo5)packing:bulk packing/small boxes packing6)delivery time: 30days D436 Square flat washer