... the appearance Material: Mainly carton steel, stainless steel, orther material okay ,material: stainess steel 304,Aluminum,brass , copper plated steel 3,size:from M3-M10Flat ... ,M5,M6,M8 series with various length Material: Mainly carton steel, stainless steel, orther material okayMOQ:100000PCS for normal sizesPacking: Bulk carton ...