1、These standoffs are made of high quality brass material for durability and long service life. 2、Waterproof standoffs with good thermal conductivity are rust resistant and easy to clean, you can simply clean them with a cloth. 3、There are several different sizes of standoffs that you can choose as needed for different purposes. 4、Great standoffs to mount on circuit boards or machine to create space or to properly position them. 5、Widely used for photographic equipment, mobile phones, laptops, various plastic shell, communication, micro-motor, computer, electrical appliances, electronics, toys, clocks, lights, locomotives and other industries. Features: These standoffs are made of high quality brass material for durability and long service life. Waterproof standoffs with good thermal conductivity are rust resistant and easy to clean, you can simply clean them with a cloth. There are several different sizes of standoffs that you can choose as needed for different purposes. Great standoffs to mount on circuit boards or machine to create space or to properly position them. Widely used for photographic equipment, mobile phones, laptops, various plastic shell, communication, micro-motor, computer, electrical appliances, electronics, toys, clocks, lights, locomotives and other industries. Specification: Material: Brass Size: M2*3, M2*4, M2*5 (Optional) Quantity: 100pcs Weight: 13g~19g / 0.5oz~0.7oz (approx.) Package list: 100 * Standoffs