There are actually 3 different props from dji that will fit your P1. 9443 and 9450 metal hub and 9450 composite hub. The 9443s will give you some added lift and extra flight time. The 9450s will give a lot of added lift but no increase in flight time. The composite hub 9450s do the exact same job as the metal hub props, for half the price. These are used in the P3 and other newer dji platforms like the e310, but will work just fine on your Phantom 1 (that is, of course, if you have the P1 with self-tightening props).