Tomcat Mouse Killer I Refillable Mouse Bait Station (16-Refill)Tomcat Mouse Killer I with Refillable Bait Station contains one Tier 1 Refillable Bait Station and 8 or 16 x 1oz of Block Bait Refills. Effectively controls mice while providing the security of a Tier 1 child and dog resistant station. All Tomcat consumer size baits are made with Bromethalin an acute, non anticoagulant active proven to kill mice faster than anticoagulant baits. Each Block kills up to 12 Mice, based on no choice laboratory testing.