The Nylex Hose Joiner 12mm with model number 715426 connects two 12mm hoses in series. It is resistant to UV rays and has TPR finish which provides extra grip in wet conditions. It has been designed with an anti-leak mechanism to prevent wastage of water.The Nylex Hose Joiner 12mm connects two 12mm hoses in series. It is resistant to UV rays and has TPR finish which provides extra grip in wet conditions. It has been designed with an anti-leak mechanism to prevent wastage of water.