Profile: Underground Devices, Inc. is a manufacturer of duct spacers, bore spacers and nonmetallic cable racks for the power & communications industry. Our brands include Wunpeece™, Duct Donut™, Saddle Rack™ and Heavy Duty Rack™. Our duct spacer accessories are used to help prevent duct bank flotation during concrete pours. Our Wunpeece Duct Spacer and Duct Donut Spacer are ideal spacers for all concrete encased duct bank jobs. Our Bore Spacer is ideal for conduit-in-casing construction.