Ramik Bars are designed to provide effective control of roof rats, Norway rats, and house mice. It contains first-generation anticoagulant Diphacinone as its active ingredient which effectively kills rodents to prevent them from damaging your property. They are made using a unique processing technology to produce a highly palatable formula to ensure high acceptance and effectiveness. All the ingredients were carefully blended and bonded, with a little mix of edible wax to form weather-proof and uniform-sized bars. These all-weather bar baits are mold and moisture resistant and it works efficiently on both dry and wet conditions. Recommended for use inside and within 100 ft. of buildings or inside trains, ships or aircraft. The product comes in 4 bars that are 16 oz each and you can choose to break if needed.