Hozelock Garden Hose Connector Plus is a great product, it is used to connect to a hose size of 12.5mm 1/2" and 15mm 5/8". There is a triple locking system featured on this product, meaning the connection is guaranteed secure up to 10 bar. The hose will be firmly connected due to the barbs which connect with the inside and the outside of the hose. The ingenious flexible hose-tail which is featured on the nut virtually eliminates hose kinking, swelling and leaking.