Modular air containment system is designed to maximize cooling predictability, capacity, and efficiency.This Rear Assembly is designed for InfraStruXure InRow RC/InRow SC, and includes: Side plenum - 2; Catch door plenum - 1; Rear insert - 1; M6 x 12-mm flat head screws - 8; Side retainer insert - 2; 6-mm snap rivet - 6; Bottom retainer insert - 1; M6 flanged hex nut - 4; Top/bottom plenum - 2; M6 x 12-mm pan-head screws - 1.