TRAPPER® Glue Boards are manufactured with low-profile plastic trays, designed to reduce the chance of rodents stopping at the edge of the tray. The trap's narrow lip also keeps rodents from skirting along the edges of the tray and avoiding the glue. Once rodents step onto the glue tray, TRAPPER's tenacious glue will hold a rat securely. TRAPPER 2-Pack contains two face-to-face glue boards which separate easily for placement. For best results, place TRAPPER Glue Boards directly in the rodent's runway between its nest and food supply -- every 8 to 12 feet (2.4 to 3.6m) for mice and 15 to 30 feet (4.5 to 9m) for rats. TRAPPER's translucent plastic tray blends with the environment for a professional appearance. To protect Glue Boards from dust and debris, use them with TRAPPER Tunnel, a sanitary, professional-looking cover that prolongs the glue's effectiveness while keeping captured rodents out of view. Tunnels are made of sturdy white plastic or cardboard and are sold separately.