2-Post Rack-Mount Installation Kit for 4-Post Rack-Mount UPS Systems The 2POSTRMKITMB enables 2-post rack mounting of select Tripp Lite SmartOnline® Unity Power Factor UPS systems. Compatible UPS models with a detachable bypass PDU include SU5KRT3UHVMB, SU5KRT3UGMB, SU5KRT3UHWMB, SU5KRT3UTFMB, SU6KRT3HVMB, SU6KRT3UXMB, SU6KRT3UGMB, SU6KRT3UTFMB and SU6KRT3UHWMB. Note: The 3U step-down transformer included in the following bundled UPS configurations requires a separate installation kit — 2POSTRMKITWM (sold separately) — for 2-post mounting: SU5KRT3UTFMB and SU6KRT3UTFMB. Heavy-Duty Steel Construction Mounting brackets are constructed of heavy-duty steel to ensure a long and reliable lifespan in your 2-post rack. The brackets support one 3U UPS system. Some mounting hardware is included.