... Bellows 3.Simple installation,inspection,maintenance,relocation Commercial Ceiling Sprinkler Connections for Firefighting1.Stainless steel bellows, welded, Braided2.Used ... clean room certification and running.3.Good Flexibility: Eliminate potential leaks and protect gel seals during seismic activity, Allow ... wish to cooperate with you. Metallic Fire Sprinkler Connections, Welded and Braided