1) material:carbon steel, stainless steel 2)grade: from 4.6-12.9 1) material:carbon steel, stainless steel2) grade: from 4.6-12.9 304(A2-70),316(A4-80)3) treatment: black, zink plated, yellow zinc plated and so on.4) packaging: first carton,then pallet or according to your order