Stainless Steel vacuum freeze dryer. Chamber measures 36" diameter X 28" deep. Hinged clamp door, dished end. (4) internal shelves. Push Button control panel with square D electrics. Equipped with Polycold systems pressurized gas chamber. Has 1HP welch Duo Seal vacuum pump. Temperature: -100 to 140 degrees C. High side pressure: 450. Low side 250 PSI.