Hook and Loop Fastener Length: 3m cover with 6.3m fastener, 4m cover with 8.3m fastener, 5m cover with 10.3m fastener. Ventilation duct length:3m. Thread: Counterclockwise thread. Our upgraded dual-opening design is compatible with both single-hose and dual-hose portable air conditioners, providing maximum flexibility for different AC models.
