Ardell 3D FAUX MINK 860 BLACK + Duo Clear Glue 1g

Does the ardell false eyelashes 3d faux mink 859, 4 pairs actually come with 4 lashes?

What is the length of 853 in mm?

Can someone be specific in what you get. It says four (4) pairs, that would mean 4x2 = 8 individual eyelashes?

Is there a video on how to apply lashes? How long do they stay on? Thanks L💛