The Wolverine manhole odor insert from Simple Solutions Distributing eliminates hydrogen sulfide-based odors that emanate from sewer manholes. It is custom made to exact dimensions to ensure a quality installation and trouble-free operation. Each insert is manufactured from a durable, high-density polyethylene copolymer material that meets ASTM Specification Designation D1248 Class A, Category 5, Type III. The carbon canister is manufactured from PVC and corrosion-resistant components. It is available with an optional hydrogen sulfide saturation indicator sticker that monitors for saturation and end-of-service life of the filter media. 866-667-8465; www.industrialodorcontrol.com.