Gardena Adaptor for changing from 33.3mm (G1) female thread to 26.5mm (G3/4) male thread 5305-20  Ref: GRD5305-20
For changing from 33.3 mm (G 1) female thread to 26.5 mm (G 3/4) male thread. List price £2.19 Grovelands Online price including Nextday Delivery £1.97