Constructed of durable, highly quality 5/8" Thermally-fused laminate Installs easily in just a few quick steps directly on to freedomRail uprights (sold separately) Big OBoxes mount directly to Uprights (sold separately) Can be adjusted to fit your changing needs Dividers create 15 separate storage cubbies for multiple uses Will hold up to 15 pairs of shoes Works with other freedomRail components sold separately