This Hozelock 2291 Double Male Connector 12.5mm (1/2in) allows two hoses to be joined together using two hose connectors. Made from the highest quality materials for ultimate durability, the 2291 fits all Hozelock connectors, and can be used to extend the length of garden hose, or used as a temporary repair solution. Connection Type Double Male. Size 12.5mm (1/2 in).