The Winco FB-TS40 Insect Trapper is designed specifically for 4" drain pipes, effectively preventing insects from entering your space. This durable drain trap seal features a reliable construction that ensures a tight fit, minimizing the risk of pest infiltration. Each unit is sold in quantities of six, making it easy to stock up for multiple installations. Ideal for commercial kitchens and food service environments, the Winco FB-TS40 enhances hygiene and pest control, contributing to a cleaner and safer workspace.