These 4" x 8" replaceable glue boards fit directly into our Anstar Traprite mouse trapping boxes. They can also be split into two 2" x 8" traps, making a 144 smaller glue traps. The TrapRite glue boards will trap the mouse in the box, and not allow it to move. Not nearly as efficient as a mouse killing snap trap, but still very effective in containing the rodent. Especially useful in hospitals, schools, commercial settings, and care facilities. The carcass will be completely contained, and the trap can just be picked up and thrown away. The cardboard box can be reused if needed.