The Next Generation First Responder Evacuation Hardware Kit converts the Next Gen Serenity crib (1st generation) into a safe and effective evacuation crib. The red, solid steel three-point gusset plate design combines with the Serenity crib’s SafeSupport steel box frame with center mattress support, providing superior strength and durability. Premium 4” non-marking casters will not damage floors. Evacuation kit includes four red gusset plates and four 4” casters. Compatible with first generation Serenity Cribs only.