Six blade propeller upgrade for Vetus Bow thrusters 50 and 80Kgf, first generation (with 12mm parallel shaft and red propeller end caps).Also suitable for the model BSCHR0EF with 10mm drive shaft. Sleeve adapters (10x12x15mm) x 2 are included for this model.- This set contains propeller with white end caps, plus 4mm dia drive pin.- Working in close collaboration with the Maritime Institute Netherlands (MARIN), the world-famous hydrodynamic laboratory, VETUS has optimised the performance of its thrusters. This has been achieved by utilising a unique propeller blade profile, which creates little or no cavitation.- As cavitation produces unwanted noise, this new blade design offers a major reduction in the operating sound levels for VETUS bow thrusters. Moreover, the application of this new propeller has reduced the current consumption by up to 10%.