If you have been involved in RC for any length of time you surely have heard of or used Master Airscrew propellers. They have had a great reputation, but recent events have called that into question. They recently released their Stealth props for the Phantom 4 series, so I was excited and bought a set for my P4P (v1). Turns out their tolerances were so bad that they absolutely would NOT clip on to my stock P4P. I document the failure here:. BTW the problem turned out to not be the rim of the hub as I suspected but I now think it is a lack of internal clearance inside the hub. Nevertheless, it won't fit and their customer service has been unresponsive. So, my advise DON'T BUY MASTER AIRSCREW PROPS for your Phantom 4.