... .6mm Surface processed with electricity draws to black color bundy tube condenserWe can produce condensers for refrigerator, freezer, icebox and ... . Surface with electrophoretic coating, thickness 10-25micrometer,black6. The tube ends sealed with rubber cap7. Dry nitrogen in the tube8 ... and samples10. Condensers for refrigerator, freezer, ice cabinet, water dispenser. Good quality bundy tube condenser