This GMP Tools air chamber assembly, Vendor Part #34644 (Millennium Part #554461), is a core replacement component for GMP fiber optic cable blowing machines. The air chamber holds and directs the compressed air that propels fiber optic cable through conduit and microduct during placement, making it one of the most critical parts of the blowing system. A worn or damaged chamber assembly can reduce blowing pressure and slow cable installation. Millennium stocks this genuine GMP air chamber assembly, priced per each, so telecom and broadband contractors can keep their cable blowing equipment operating at full pressure.