Premier Conduit is the only manufacturer of Plenum rated terminal adaptors, which we make available in multiple sizes that fit perfectly with common conduit sizes. With the UL-2024 listing of our terminal adaptors and our non-conductive and corrosion resistant couplers, customers can utilize our products with any type of conduit that matches their size. Whether you need a fitting for general purpose HDPE duct or UL-2024 listed Plenum conduit being used to secure a super computer cabling, our fittings are rated for any job. We offer Plenum listed terminal adaptors and anodized steel couplers in Erie, PA in the following sizes, 3/4”, 1”, 1-1/4", 1-1/2" and 2", making it easy for you to find fittings that match your duct.