Made plastic material, durable. Multiple entrances, 5 transparent sheet doors per trap, easy to attract roaches come in but can not escape. You need to put any fragrant bait into the center of the roach trap to attract cockroaches (such as squid silk, biscuits, sesame oil etc). Once the cockroaches are caught, they will attract others. So you don?t need to clean up immediately and easily catch them all. Non-Toxic Roach Trap is use for all species of cockroaches. The upper half has a air vent that can be used to insert water to drown the cockroaches. Simple to use, easy to clean and reusable. In order to achieve better effect, you need to put traps near its nest, such as corners of the room, the water crossing or kitchen.