Found: Ascender under Heart ledge 9/19/17

I was doing some aid practice at the base of El Cap on the 19th and saw an ascender fall to the base by Delectable Pinnacle. I saw a party of four above me and assumed that one of these folks lost their lefty. 

I couldn't find any markings on it but it fell with a certain biner. Let me know what that biner color and style is and it's yours.

Thanks,

Eric