hello friends..
was looking 10 3.8 props and found these two props...
now confused what is difference between these to props???

http://www.ebay.com/itm/2Pair-10-3-8-1038-Carbon-Fiber-Props-Propeller-CW-CCW-Special-for-DJI-QuadCoptor-/121479737783?pt=LH_DefaultDomain_0&hash=item1c48c1b1b7

http://www.ebay.com/itm/2Pairs-1038-10-3-8-3K-Carbon-Fiber-Propeller-CW-CCW-Props-for-DJI-F450-F550-Hexa-/231311728956?pt=LH_DefaultDomain_0&hash=item35db40e13c

The 1st one is some gemfan type while the second one is slowfly.
Don't know more than this.

i want to use 10X3.8 props with emax 2216 motors.. ( they suggested APC 10X3.8 props with 4s battery ) now confused which one to buy???

Comparing plastic versions of both.
1st- Developed for multi - derived from graupners, Slightly lesser thrust than slowfly per amp, But stiffer. And holds shape at higher RpmsUse.
2nd Slowfly . Lots of thrust per amps but not good for bigger size(>12) and high speed. U can use either but this suitable as hovering prop and first one as forward flight prop/high speed.

thanx.... confusion cleared..