From Amazon
Bosch Extension Hose 6m (160 bar, Compatible with: EasyAquatak 110/120, UniversalAquatak 125/130/135, AdvancedAquatak 140/150/160, AQT 45-14X/33-10/33-11/35-12/37-13/40-13/42-13/45-14 X)
Powertool World
Bosch Green 160 Bar High-Pressure Hose 6m for Aquatak Pressure Washers F016800482