Just One Bite EX, 128 Count, 0.5 OZ, Bait Block, Contains The Active Ingredient Bromethalin, Due To Stop Feed Action, Rodents Cease Feeding After Consuming A Toxic Dose, Rats & House Mice Usually Consume A Lethal Dose In A Single Feeding, But It May Take 2 Or More Days For Them To Die, 4 LB Pail, For Rural/Agricultural Use Only, Ordering Restrictions May Apply, Contact Merchant For Ordering Details.