This conduit is a 3 1/2-inch Schedule 40 rigid PVC raceway designed for general-purpose electrical installations. Schedule 40 indicates a medium-thickness wall that provides good strength while remaining lighter and easier to handle than Schedule 80. Being a nonmetallic PVC conduit, it resists corrosion, moisture, and many chemicals, making it suitable for underground or indoor protected applications. It is listed by Intertek, meaning it has been tested for safety and compliance with recognized electrical standards. Overall, it is commonly used for routing and protecting electrical conductors in residential, commercial, and light industrial environments.