Contains 0.0375% w/w coumatetralyl. Based on a special "soft block" formation, never before seen in the UK, this bait has proved to be particularly attractive to rats. Indeed tests have shown it to be preferred to cereal-based baits. As a block, however, it is "non-spill" and can be secured in place. It has proved to be effective against both the "good feeders" and the more difficult-to-control "hesitant feeders" in the rat population, leading to excellent levels of control.