This plastic ducting connector is specifically crafted for 125mm (5") diameter solid plastic or flexible ducting. The male coupler enables seamless connection between solid plastic or flexible ducting. It is perfectly suited for bathroom or kitchen extractor fans, hydroponic systems, and in-line extract fans. Moreover, it can be seamlessly incorporated into lengthy ductwork setups for a myriad of purposes, including whole-house ventilation, passive stack venting, positive input ventilation, air conditioning, HVAC systems, and heat recovery systems.