If you have a rubbermaid stock tank that needs to be plugged off for you to fill up, here is the correct plug that you need! The color of plug depends on our current inventory - at the time of this posting, black. This will fit any size Rubbermaid stock tank - 50 gallon, 70 gallon, 100 gallon, 150 gallon, 300 gallon.

If you have any questions, please do not hesitate to ask.