PrevNextAvailable in 22, 20, or 18 Gauge Slats Fusible Link Standard Up to 4 Hour UL Label 2-Year Limited warrantyAvailable in 22, 20, or 18 Gauge Slats Fusible Link Standard Up to 4 Hour UL Label 2-Year Limited warranty April 8, 2015By Brian SteiegrwaldOverhead DoorsRolling Steel Doors