help with sexing

This plant has been on 12/12 under 250W HPS for about 13 days now.

Are these male flowers?

If so, how long can I let them grow before removing them? Want to be sure about the sex before taking them out.

Pictures aren't that great but hope someone can tell.

thanx

yes sir.......

yeap. male. and you should start separating/killing already if you don't want seeds in your crop. sorry

Without a doubt male... Kill them

yes they are male sorry dude.put a bag over them and seal before you move them out of the room.due to some pods may have cracked and pollenate the females in your room