The package includes: 1U, 2U, 4U, a total of 6 pieces of rack in 3 different types and at least 12 screws for mounting M6 type, you can meet your needs for installing rack panels, no need to install and purchase different types of blank rack mounting plates Fine Workmanship: these mount panel spacers are made of metal material, with nice workmanship, the surface is deoiled, pickled, phosphated, electrostatic spraying technology, not easy to rust and reliable, frosted pattern is easier to install, can be applied for a long time