CHAS - 7450 ESS-7 AC/DC CHASSIS SPARE 7450 ESS 7 slot Shelf, includes one (1) Fan Filter (reqd=1). Accepts two (2) SFM(2)-xxx (reqd=1, 1+1 red =2); two (2) AC PEM w/ AC PSU (reqd=1, 1+1 red=2) or DC PEM (1 & 2) (reqd=1, 1+1 red=2); two (2) Fan Tray (1+1

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