The Karcher Professional Eco!Booster nozzle delivers a wide spray which covers 50% more area than a Karcher Power Nozzle and features a revolutionary design in which air is drawn in to the nozzle to direct the water stream, leading to impressive cleaning results in less time. The TR 050 nozzle is suitable for the HD and HDS 9 and 10 pressure washers below (it may also be suitable for models introduced after this list was compiled). Please Note: Karcher Professional Eco!Booster nozzles use the Easy!Lock connection system. Although this nozzle is compatible with all models listed below, some variants (especially older machines) may not have Easy!Lock connectors as standard, in which case a suitable Easy!Lock adaptor will be required in order to use the nozzle. Please verify what type of connection your machine has to ensure compatibility. CompatibilityHD 8/18-4STHD 8/18-4ST HHD 9/20-4 SXA PlusHD 9/21 GHD 9/23 DeHD 9/23 De TR1HD 9/23 GHDS 9/20-4 ClassicHDS 9/20