50mm fan holder for prusa mendel i2

fan holder for prusa mendel i2, fixed with 2x M3 on x-carriage IMPORTANT INFORMATION:

part was optimized while doing a complete extruder & x-carriage-construction .... please have a look to my other things and have a look at the new fan-holder-design in the pictures there! I did not try it yet, but the airflow streams at the top of the extruder - and is not cooling the heating area!!!