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This is a VMP ER-184-4PKIT 2 Post Expansion Kit For ER-184. This item serves a dual functionality role by expanding your ER-184 from a 2-post equipment rack to a 4-post equipment rack, while providing your ER-184 with additional weight stabilization.
Both its side-stabilizing bars and steel construction bring you the heavy-duty durability you need to depend on to keep your equipment safe for a long time.
With quick and easy installation, you'll have all your equipment mounted in no time.