Sorry we do not have any specs but here are our visual observations: 12x8x4 approx outer dimensions (see picts) Inner chamber is approx 11.5x6.5x3 inches There are 8 pass through RF filter connections that say "Erie" on them, (16 if you count both walls they pass through) two have additional inductors in series (see picts) There is one pass through RG55A/U RF cable with BNC on outside and TNC on inside . The inner chamber is isolated by approx 1/2" on sides, 1/4" on bottom and top. Bottom of chamber is fastened to 2 phenolic looking spacer bars to secure in place. There are some studs in the chamber for mounting PC boards (see pict) Outer chamber has 6 threaded mounting holes on bottom . Outside looks to be silver plated (thus the tarnished look) Inside appears to be gold (or gold colored metal /gold silver mix????) plated There are 4 screws to tighten down the lid looks to be an expensive well made item, coated with precious metal on all surfaces. Guessing it could be used for testing cell phones, isolating small transmitters etc. All metal, guessing brass? it is non magnetic and too heavy to be aluminum. 7.5lbs Selling as you see it Ships insured