ITEM NAME:270Pcs M2 3-25mm Male to Female Brass PCB Standoff Screw Nut Assortment AOQ.A Standoff Is A Fastener Used To Create Space Between Two Objects, Often To Properly Position Them. Standoff: Length 3 ~ 25mm [Not Include Thread Length]. 10x3mm Brass Male-Female Standoff. 10x5mm Brass Male-Female Standoff.