Household PE Pipes Double-Wall Corrugated Pipe for Fresh Air System Antibacterial Food Grade Fresh Air PE Pipe
Ground Air Supply, ABS, Direct Tee, Horizontal Bending, Climbing Wall, Elbow Ventilation Auxiliary Materials
Exterior Wall Tuyere, Check Valve, Check Valve, Breathable Cap, Rain Cap
HDPE Double-Wall Corrugated Pipe for Fresh Air System