I have a "slo flyer not for gas eng" (stated on the package)10x7 composite prop and my electric plane calls for a "thin" 10x7 composite prop. is there a differance in what I have and what it calls for?</p>

You have the right prop. "Slo-flyer" and "thin" are referring to the more fragile electric props. Other electric props like the more sturdy GWS "HD" or APC props would work well too. The diameter and pitch are the parameters of most importance.