Ant formicarium Nest farm V3 www.antbizzo.com

16 mm and 17mm ports for tubes to help control humidity. The lines inside the wall that go to where the sponge needs to be are 0.50 mm. The lines that lead to the traffic area are 0.25 mm. This will keep all ants out of your hydration system and allow enough moisture to get inside the nest area. The hole for the vinyl tube is 3/8. I attached a plug along with the print so you can close the 3/8 just incase you ever need to. you may need to file to get the tubes and plug to fit. It just all depend