Couplers are used in grow room ventilation systems to join items like ducting, fans, filters and reducers together.
FEMALE couplers sit on the outside when joining two rigid components together such as fans, filters and reducers.
MALE couplers sit on the inside when joining two flexible components together like ducting.
Couplers have many uses, the most common being joining two pieces of flexible ducting together.
MALE couplers should be purchased for joining two pieces of flexible ducting together, they sit inside the ducting.
FEMALE couples are for joining two rigid ventilation components: the flanges of fans, filters and reducers fit inside the female couplers.