The latest design with button-ring which boasts of merits can be used under high water temperature, high pressure, anti-corrosion, free twist, well-sealed, each button-ring can be moved freely. TOTALLY NON BREAK DOWN AND NON TWIST! With Reasonable price and LONG-LIFE Material: 1)chromed brass 2) Flexible or extensible 3) Inner hose: PVC or EPDM 4) Length in line with customers"requirements 5) Type of two nuts in line with customers"requirements. F1/2"*F1/2" at 14mm*150-200cm available