The E-Z Flange Jr. Spiral Pipe System is assembled by applying a gasket to one flange, mating the two flanges together, and attaching the barrel clamp. The E-Z Flange Jr. Spiral Pipe System is sealed so tight that it out performs both ASHRAE and SMACNA Leakage Class 3 Testing. There is virtually no leakage at the transverse connections (test data available). Meets SMACNA Rigidity Class A per the SMACNA Testing and Research Institute.E-Z Flange Jr. sets are fabricated to fit inside the spiral pipe and fittings ranging from 6 to 24 diameter.Manufactured from 22 gauge galvanized material meeting specifications ASTM A-653 (lock forming quality).Also available in PVS, aluminum, and paint grip materials upon request.E-Z Flange Jr. can be installed on site.Ducts can be disassembled and reassembledE-Z Flange Jr. is assembled using a barrel clamp system that locks together with two 38 carriage bolts, no screws are required.E-Z Flange Jr. can be used on single wall, double wall.Test data available.Sold in sets only, a set consists of 2 flanges, and 1 barrel clamp.