For the last 25 years, the formula for Magnetic Roach Bait has been constantly improved and made with the highest quality food grade ingredients to deliver a superior attractant that is great for control of cockroach populations, the company says. Magnetic Roach Bait is an easy-to-use, long-lasting borate bait packaged in 1.23-oz. reservoir tubes and 20-oz. jars. The bait in the reservoir tube can be applied using the enclosed plunger unit, or by using the specially designed True Blue Bait Gun to deliver more uniform amounts. The bait in the jar can be applied to larger non-food areas using a spatula.