[Specifications] Material: Brass(H59-1) + Stainless steel Quantity: 30 pieces of spacers screws nuts[Features]1. These hex brass standoffs have good mechanical strength, wear resistance, corrosion resistance.2. Meet the standard metric system. The average error is less than 0.01mm. The thread is very sharp, clean, and accurate. Accurate dimensions make your installation or maintenance easier.[Package Included]M3 Stainless steel nuts, 10 piecesM3 Stainless steel screws 5 mm, 10 piecesM3 Brass male-female standoff 60 mm + 6 mm, 10 pieces