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The Flexmaster U.S.A.® Triple Lock product is an all metal flexible duct that is constructed entirely without the use of adhesives. The Triple Lock Mechanical joint makes an air-tight seam, while the circumferential corrugations provide excellent strength and flexibility
Minimum bend radius to center line is one diameter. However, our recommended radius is 1.5 diameters in accordance with accepted practice. Triple Lock stainless steel ducting may be easily cut to size (up to 8 ft) and hand-formed into offsets or elbows to suit job conditions without subsequent sagging or droop.
Triple Lock has much lower pressure loss than conventional cloth ducts due to the small but consistent corrugations that provide both strength and flexibility.
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