... , there is no way to find out,it's a trap. size:16.5x4x4cmmaterial:PPpackaing:blister cardcarton size:qty in per ... carton: 48pcsG.W: 2.23N.W: 1.73This is a trap for rats or mice,we put some foods in one ... end of this tube, when rat creeped in to this tube,and get the food,the ... ,so the door closed,and there is no way for rat to get out. rats& mice catcher/trap/killer