Lost green c4 on e. buttress of el cap.

I fumbled a .75 at the ninth pitch belay and it landed halfway up pitch 5 (the one that starts on the big ledge after moving the belay.. Marked with orange paint, on a green Nano 23. If you want to keep it, it's in great shape and I hope it fares you well, if you want to return it, i would be grateful to have it back.

Thanks
-Simon