Rat Trap Tunnel. Helps prevent other animals from getting caught in the trap and forces rats and mice to enter to more likely trigger the trap.  Bonus for USA residents in that you can put 2 inch PVC pipes onto the openings if you believe it will help keep birds out.  Will fit a 3.07 x 2.67 x 5.98 inches rat trap. No supports needed.  Printed with PETG