Excellent condition, very clean, no chips, no dents. Thick high quality stainless steel. Surplus from a cryogenics laboratory. Spherical cube vacuum chamber by Kimball Physics, fits 4.50" CF (2) and 2.75" CF (4). Model MCF450-SS20400-A, serial 9HM180. Identical to model MCF450-SphSq-E2C4. Specifications: Spherical ID 3.60" (91.44mm), Internal volume: 26.7 cu. in. (438 cc), Weight: 4.68 lbs (2.12 kg). Measures 4.25 X 4.25 X 2.75 inches.