Big Cheese Ultra Power Block Bait Rodent Killer 6 X 20G | Stv567 Bait refills for use with the STV566 and STV565 Use indoors and around buildings Contains Brodifacoum H: 19cm W: 13cm D: 5.5cm 6 x 20g blocks Big Cheese Ultra Power Block Bait Rodent Killer 6 X 20G | Stv567 Ultra Power Block Bait Rodent Killer from The Big Cheese is a fast-acting rodent poison for indoor and outdoor use in tamper-resistant bait stations. This powerful formula combines proven palatability with the most potent active ingredient available on the amateur market to deliver fast and effective control of rodent pests. Part of the Ultra Power range, this product will kill rats and mice in just one feed, with satisfaction guaranteed. Features Most powerful rodent poison available in the market For indoor and outdoor use Contains brodifacoum