Right Size to Use: the rack mount brackets ears are designed with adjustable mounting hole spacing, the distance between the mounting ear and the hole is about 14-29 mm/ 0.5-1.14 inches, so the installation distance can be adjusted according to the size of the network switch; Please check the size before buying | Package List: the universal rack mount kit is composed of 2 rack mounting ears, 8 sets (16 pieces) of switch screws (M3 and M4), 4 sets (8 pieces) of cabinet kits (screws and snaps), enough for switch rack installation needs or kit replacement | Quality Material: made of reliable metal material, the rack mount kit is sturdy and durable, with strong bear capacity, not easy to break, the durable accessories ensure the firm installation, hard to fall off | Wide Compatibility: our rack mount bracket is widely compatible with most 17.3 inch Buffalo Tech/ NETGEAR/Dell/ D-Link/ Linksys/ TRENDnet products, bringing more convenience | Make Your Equipment in Order: the rack mount accessories are not only for more switch models, which allow switches to be arranged neatly and save space, but also for some speaker rack mount kit