Tecmojo 4-post adjustable shelves features high quality cold rolled steel structure with electro-static powder coated finish for durability. Mounting depth can be adjusted between 13.78-15.75” to fit in different depth of racks or cabinets. Shelf surface dimensions are 13.78 x 16.69 inch and holds up to 99lb of equipment. The shelf has slotted venting to improve air flow and to help prevent overheating of your equipment. The shelf is perfect addition to your server cabinet for supporting non-rack mountable equipment such as routers, patch panel, monitors or tower computers. Available in variety of sizes. Mounting hardware are included for easy set up.Standard shipping is FREE to the 48 contiguous states and Washington DC