20 rack vertical spaces in lower area and 10 rack spaces in top, rack system, the PR adapts to a wide range of applications. Features HSA's signature locking rolltop tambour door securely covering all top and front rack spaces. An optional Podium Top or optional Mixer Top ("drop in" bay) is available in place of the upper rack rails for even more versatility. Complete with keylocked removable rear panel with lower rear cable exit (optional ventilated or dual-fan rear panel available) and ventilated floor with large cabling exit.