Unopened Merriway Screw-On Plastic Snap-Fit Garden Hose Tap Reducing Connector Adaptor. 25 mm (1 inch) Tap to 19mm (3/4 inch) Hose , Green. Other garden tape photo is an example how you might use it.
More info on this link -
https://www.amazon.co.uk/Hardware-BH03992-Snap-Fit-Reducing-Connector/dp/B0...
Collection near Liverpool St Station Shoreditch / High St Station