NUC opening/restricter help

[mmmooretx]

I saw it in one of the YouTube videos on catching swarms. It looks like a round plastic item, 6" diameter (?) with a screw hole in the middle so it can rotate. I think it has four positions: full open, queen excluder mesh, vent only for transport and I am not sure on the last one. It sits over a round hole on the front of the NUC and rotates so you can select your desired opening. I think the one I saw was green. I am getting ready to make some NUCs and would like to buy some. Please who has them for sale?
Thanks in advance.

[BeeCurious]

I have these:
http://www.brushymountainbeefarm.com...uctinfo/676DE/

[mmmooretx]

That is it, thank you.

[BeeCurious]

Someone sells smaller metal ones but I don't recall who.

[gmcharlie]

Someone sells smaller metal ones but I don't recall who.

Walter kelly has the metal ones, I put on 30 last year on nucs, thinking they would be great, but actually I have not used one yet on a nuc. I close up bug hives to move them, but for me nucs seem to stay in the yard and it was a waste of time and money.

[westernbeekeeper]

Here are some links for smaller metal and plastic ones, as well as the same type as the above mentioned ones.

https://kelleybees.com/Products/Deta...3339&grouped=1

http://www.betterbee.com/Products/Nu...ee-Hive-Portal

On the link from Kelley Bees, when you open the link, you will need to choose an option for the product; it has several, including the plastic and metal disc entries.

[JDA]

Walter Kelley Sells the Metal ones. I use the metal as I think the plastic will break down after a few years. Click on the link then select Disc Entry in the drop down menu.

https://kelleybees.com/Products/Deta...3339&grouped=1

[flyingbrass]

the other area or setting on the disc is for drone escape, but I would like to know under what circumstances you would set your nuc opening to drone escape?

[odfrank]

[
Mouse guard, robbing

[mmmooretx]

Great inputs and thank you all! One item I did find interesting is that on the Brushy Mountain site they called one opening a bumblebee excluder and the Better Bee site they call it a Drone excluder. I am not sure that there is enough difference between a queen and a drone honeybee for it to work. Just for chuckle value can a small cell queen get out of a standard queen excluder?
Thanks again for all the information it has helped me.