All 4 Male?

Hi all.

I'm currently doing my first grow. I've put 4 of my 8 plants in flowering. However, the 4 I've put in all appear to be male. I'm pretty positive that I've sexed them right, but I really want an opinion before I go and remove them

Thanks,
Justin.

P.S: The strain is northern lights, and they've been on 12/12 since the 22th of Dec.

 

Here's another 4 pictures.

 

Thanks for the help guys. I just wanted some conformation before I went to remove them.

Regards,
Gman1223.