Pelgar Rodex 25 Oktablok IiBait blocks containing bromadiolone 0. 0025% w w. Ideal for the control of rats and mice in and around buildings, the largest single pack available and ideal where bait security is paramount. For small and large mouse infestations use 1 sachet. For small rat infestations use 1 2 sachets or for large rat infestations use 3 4+ sachets. This product is suitable for amateur use.