100" 3/8" flex conduit. Flexible reduced wall steel conduit. Fits regular armored cable or flexible conduit connectors. Designed for electrical wiring where UL listing is required. Made from hot dipped galvanized steel with heavy zinc coating. Medium weight conduit. Due to the fluctuation of the copper market, Do it Best Corp. reserves the right to bill at the prices prevailing on date of shipment. We reserve the right to substitute similar quality by various manufacturers. UL listed. 3/8" x 100", internal diameter: 0.375 minimum, 0.393 maximum; external diameter: 0.560 minimum, 0.610 maximum; 2" bending radius No. 55081806: 1/2" x 25", internal diameter: 0.625 minimum, 0.645 maximum; external diameter: 0.860 minimum, 0.920 maximum; 3" bending radius No. 55081805: 1/2" x 50", internal diameter: 0.625 minimum, 0.645 maximum; external diameter: 0.860 minimum, 0.920 maximum; 3" bending radius No. 55081802: 1/2" x 100", internal diameter: 0.625 minimum, 0.645 maximum; external diameter: 0.860 minimum, 0.920 maximum; 3" bending radius No. 55081921: 3/4" x 25", internal diameter: 0.812 minimum, 0.835 maximum; external diameter: 1.045 minimum, 1.105 maximum; 4" bending radius No. 55081905: 3/4" x 50", internal diameter: 0.812 minimum, 0.835 maximum; external diameter: 1.045 minimum, 1.105 maximum; 4" bending radius