12.0" diameter acrylic chamber for all FreeZone Freeze Dryers. Provides visibility for bulk freeze drying. Accommodates Tall Product Shelves (7317200). Includes aluminum lid with eight neoprene valves with plastic knobs for use with both 1/2" and 3/4" adapters, cap for vacuum port and pass through for electrical cords. 8" diameter opening to collector on bottom of chamber. Will fit 10.12" or 14.0" diameter condensers.