These black hanger rails are made to match the depth (front-to-back) of our wire shelving. Positioning between two posts, the product strengthens stability and supports various accessories to store even more on your unit. For depth only, width availableHERE Accommodates accessories and hooks Reinforces stability between shelves Durable epoxy-coated steel construction Suitable for wet and dry environments Includes plastic clips to attach to posts *May not be interchangeable with other brands' lines. For actual outer and inner dimensions, see the Extended Information section below or view ourWire Shelving Size Guide.