Starter Connector Pack contains x1 Hozelock 2055 AquaStop Connector PLUS for (12.5mm & 15mm) Hose Pipes x1 Hozelock 2050 Connector PLUS for 12.5mm (1/2") & 15mm (5/8") Hose Pipe x1 Hozelock Threaded Outdoor Tap & Hose End Connector 3/4" (26.5mm) & 1/2" (21mm) 1x Hozelock 2055 AquaStop Connector PLUS for (12.5mm & 15mm) Hose Pipes The Hozelock Aqua Stop connector has an internal valve that stops the water flow when an accessory such as a spraygun is disconnected. This saves you having to go back to the tap to turn the water off when you are switching between accessories. It also helps you save water in the garden because it stops the water flow so less water is wasted. This useful connector saves you from turning the tap off every time you change your hose pipe accessories. Simply placed on the end of the hosepipe spray gun Can be used with all 12.5mm 1/2" to 15mm 5/8ths" hose pipes Triple locking for securing up to 10 bar Suitable for use with all 12.5mm 1/2'' and 15mm 5/8" hose.