"- High-quality oak, black and maple wood grain laminate finish- Easily assembled with included hex key and hardware- 16"" deep, 18"" deep 22"" or 28"" deep racks available- Optional RKW caster kit and heavy duty RKW-HD caster kit available- Optional RK-RRx rear rackrail available (x = total number of rackspaces)- Optional RK-GDx smoked, tempered glass door available (x = total number of rackspaces) for BRK / OBRK / MBRK models- Optional SH-BRK Quick-Position™ shelf mounts without rack screws, ONLY WORKS with 18"" deep BRK / OBRK models- Most models ship via UPS"