ITEM NAME:120Pcs M3 Male Female Hex Brass Spacer Standoffs PCB Board Screws Nut Assortment.Quantity: 120pcs. Material: stainless steel+brass. 10xM3 6mm Brass Female-Female Spacers. 10xM3 10mm Brass Female-Female Spacers. 10xM3 15mm Brass Female-Female Spacers. 10xM3 20mm Brass Female-Female Spacers.