The assortment standoffs screws are ade of brass and stainless steel material, durable, not easy to rust and deformation. In electronics, they are frequently used to raise a printed-circuit board above a surface. Features -Color:Golden -Material:Stainless steel, brass -Size:2.00X0.30X0.30cm/0.79X0.12X0.12in -All of those standoffs are well classified in different grids of plastic box for easy to use and store. -Standoffs are nice fasteners for keeping printed circuit boards both stationary and elevated from surface. -With various specifications of standoffs to meet your different demand, such as the interior of a computer chassis. -It is rust-proof and , durable and hard to break, which prolongs the service life of the product. -These brass motherboard standoffs are corrosion resistance, suitable for industries, electroplating, electronics, etc. Package list: 20 brass male-female standoff (5mm + 3mm) 20 brass male-female standoff(10mm + 3mm) 20 brass male-female standoff(15mm + 3mm) 20 brass male-female standoff(20mm + 3mm) 20 brass female-female standoff(5mm) 20 brass female-female standoff(10mm) 20 brass female-female standoff(15mm) 20 brass female-female standoff(20mm) -2 stainless steel screws ( -2x4mm) -2 stainless steel nuts ( -2) 2 box