Secure and leak-proof ducting for your air conditioning when you are working on indoor crop cultivation is essential for you to get the best out of whichever system you set up. These Female Couplers can be used with both flexible and solid ducting and will join circular ducts together to enable good ventilation to be provided for the growing space. With these female couplers you are looking to minimise any leakage from the joint so that air is delivered to your plants without interruption. As with any air conditioning unit you should check the condition of the various bits of equipment. Ducting connections need to be firm and they also should be kept clean so there is less risk of disease or damage to plants. The couplers can be removed for maintenance and cleaning. Always ensure measurements are correct.