Pest-Stop Super Rat & Mouse Killer MAX Wax Blocks are fast acting with no known resistance. Effective in damp areas. Contains brodifacoum (legally compliant 25ppm). It has a highly attractive chocolate scent. Packed into plastic tubs for freshness and durability. Recommended for use with bait station, easy to secure within lockable bait boxes. Directions for use included. Each tub contains 15 x 10g wax blocks.