Features These standoffs are made of high quality brass material, which is durability and long service life. This brass spacer standoff is widely used in machinery industry, electronic industry, testing equipment, electric equipment, medical equipment, communications, automotive, engineering machinery, electric power and other fields. There are nine different available lengths that you can use as need for different purposes. Waterproof standoffs with good thermal conductivity are rust resistant and easy to clean, you can simply clean them with a cloth. Great standoffs to mount on circuit boards or machine to create space or to properly position them. Features: These standoffs are made of high quality brass material, which is durability and long service life.  This brass spacer standoff is widely used in machinery industry, electronic industry, testing equipment, electric equipment, medical equipment, communications, automotive, engineering machinery, electric power and other fields. There are nine different available lengths that you can use as need for different purposes. Waterproof standoffs with good thermal conductivity are rust resistant and easy to clean, you can simply clean them with a cloth. Great standoffs to mount on circuit boards or machine to create space or to properly position them. Specifications: Standoffs: Material: Brass Type: Male-Female Size: M2.5*5+6, M2.5*6+6, M2.5*7+6, M2.5*8+6, M2.5*9+6, M2.5*10+6, M2.5*11+6, M2.5*12+6, M2.5*15+6mm Quantity: 20pcs each size Nuts: Material: Stainless steel Thread: M2.5 Quantity: 180pcs Box Size: 13 x 6.5 x 3cm / 5.11 x 2.55 x 1.18" Package Includes: 1 Box x Standoff Assortment Package List