Just Arrived Is This Tenney Temperature Altitude Chamber. Has Altitude Range of 65,000 Ft. to 100,000 Ft. Temperature Range of -65 to +170 Deg. C, Air Cooled, Cascade System, And Includes A Welch Vacuum Pump. This Unit Has 15.5 Cubic Ft of Interior Work Space, Is Very Clean And Is A VERY HARD TO FIND Chamber Used. Of Course Will Complete Our 30 Point Refurbishment Process, And Includes Our Parts & Labor Warranty!