DC motor propeller-60 & 80mm diameter

A 2 blade (80mm) and 3 blade (60mm) propeller for those tiny 3-6V DC motors with 2mm shaft. They are 7mm thick with a final angle of 60º (I think). The 3 blade has an external protection ring. Thanks a lot to Robotbeat for the customizable desing: https://www.thingiverse.com/thing:116974