| MANUFACTURED FOR STRENGTH, ECONOMY AND PREDICTABLE PERFORMANCE Spiral Metals Corporation manufactures "Hermetic-Lockseam®" spiral tubing from galvanized steel, aluminum, and stainless steel in a broad range of diameters (3"-60" ) and gauges see charts), and in any length specified (10' , 12' , & 20' are standard). (10' minimum order) It is available with the standard "outer seam" (smooth interior), or with an inner seam" (smooth exterior) in galvanized steel and aluminum, only. Spiral Metals’ "Hermetic-Lockseam®" spiral tubing offers many advantages: -High strength/rigidity to weight ratio -Low friction loss -Airtight -Consistently predictable for economy and ease of installation using Spiral Metals’ wide range of "Hermetic-Lockseam®" fittings |