This a smaller version of our traditional style porthole barometer. This model has an all brass housing measuring 5.5" from face to back plate. It is also from Bey-Berk. A company known for quality timepieces and weather instruments. It has the same instrumentation as our larger model and can mount directly to a bulkhead or plaque. ï hinged front, beveled glass ï tarnish proof solid brass housing ï German precision instrument ï 5.5" x 2.25" ï 3 mounting holes on the rear flange Customizing is not available.