Terad3 Blox by Bell Labs features the newest formulation in the fight against rodent infestations, using a whole new active ingredient: Vitamin D3. This new Vitamin D3 bait kills anticoagulant-resistant rats and mice (those resistant to other baits such as Contrac) and substantially reduces the risk of secondary poisoning. Terad 3 also poses a low toxicity to birds. The bait features a dense, tightly compacted 1 oz. bait block with superb durability, mold and moisture resistance and the ability to remain stable in temperatures as high as 200F. Best of all, with Terad3 you get a highly palatable and attractive rodent bait that rats and mice just can’t resist. Available in 4 lb. and 18lb. pails of 1 oz. blox.