From the manufacturer Hozelock AquaStop Plus (12.5mm & 15mm) Switch between watering accessories without wasting water with the AquaStop feature. Hozelock AquaStop Made from the highest quality materials, the Hozelock AquaStop hose end connector can be attached to 12.5mm and 15mm diameter hose. The internal valve stops the water flow when the watering accessory is disconnected, enabling you to easily switch between accessories without wasting water or getting wet. Key Benefits Include It has an internal valve that stops the water flow when an accessory is disconnected Use at the hose end attachment end of the hosepipe for best results The flexible hose-tail reduces stress at the connection point to help reduce hose kinking & leaking Twin soft touch pads make this connector easy to use, even when wet Not All Connectors Are Made Equal Hozelock AquaStop Connector Hozelock AquaStop Plus Connector Hozelock AquaStop Pro Connector Hozelock Hose End Connector Hozelock Hose End Plus Connector Hozelock Hose End Pro Connector Connector Type Gun/Sprinkler Gun/Sprinkler Gun/Sprinkler Hose End Hose End Hose End Hose Diameter 12.5mm, 15mm 12.5mm, 15mm 12.5mm, 15mm, 19mm 12.5mm, 15mm 12.5mm, 15mm 12.5mm, 15mm, 19mm Material Plastic Plastic Metal Plastic Plastic Metal Soft Touch ✓ ✓ ✓ ✓ ✓ ✓ Flexible Hose-tail ✓ ✓ ✓ ✓