Since 1959 Spunstrand® Inc. has manufactured the highest qualify fiberglass reinforced products (FRP). We have furnished miles of fiberglass duct: from below-slab and underground duct to above-ground industrial and municipal duct, along with numerous other specialty products. Our products can be found in every state and many foreign countries around the world. All these years of production and all these miles of duct have produced a multitude of trusted and reliable services available to our engineers, contractors, and architects. THE PRODUCTS WE MANUFACTURE: - COMMERCIAL & RESIDENTAIL UNDERSLAB HVAC DUCTWORK - INDUSTRIAL & MUNICIPAL FUME EXHAUST AIR DUCT - ZERO LEAK & BALANCING DAMPERS - CARBON SCRUBBERS (Vertical & Horizontal Bed) - MIST / GREASE ELIMINATORS - SILENCERS - FRP STORAGE TANKS - MINE & TUNNEL VENTILATION DUCT - SPECIALTY PRODUCTS