Does anyone have a good source for 3mm tape?

Also, on the the stock units, what "Curvature" would they be? I believe it is AA but am not sure.

Stock units are spec’d very ‘middle of the road’ and have a ‘CC’ front. The units have medium density, body wave (one step up from straight), freestyle and 6” of real human hair. The size is 8” x 10” and can be trimmed to fit your bald area.
Regards,
John