Refillable bait station contains one Tier 3 Refillable Bait Station and 4 x 1 oz. Block Bait Refills. Effectively kills mice while providing the security of a Tier 3 child-resistant station. Clear lid for easy bait monitoring. Bait Station is approved for indoor use. Bait is made with Bromethalin – an acute, non-anticoagulant active proven to kills mice faster than anticoagulant baits. Each Block kills up to 12 Mice.