Ehab, is 6985 or 5985. I just got 4 HS-5985MG and they are the same specs as yours. 144 oz.in @ 4.8v and 172 oz.in @6v. They said have 3 metal gears and one karbonite, not sure wich gear is the karbonite. I'm planning to use them in my new pst panther for ail, elv. and rudd.

Rgds
Alejandro