This Tomcat Mouse Killer III bait station is tamper resistant and safe to place in areas frequented by children and dogs. Designed with a clear lid for easy bait monitoring, this disposable bait station uses the active ingredient bromethalin, an acute active that will control anticoagulant resistant house mice. Refill station until supply of blocks is gone. | Motomco Tomcat Mouse Killer III Bait Station | Size 4 oz