HOZELOCK - Double Male Hose Connector Pro : Ideal for Extending the Length of your Hose, Robust, Universal Coupling (All Diameters) [2044P0000] : Amazon.co.uk: Garden
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Hozelock 2291 Double Male Connector : Amazon.co.uk: Garden
Hozelock Double-End Male Hose Connector - Screwfix
Hozelock Y Connector Hose Extender 2293
Hozelock 1/2", 21mm Pro Metal Hose Connector : Amazon.co.uk: Garden