Fusible Link Kit for Laundry & Trash Chute Discharge Door. Fire Damper for Linen Hopper Doors, and Rubbish Horizontal Rolling HRD's DISCHARGE Fusible Link Kit. ADJUSTABLE: Chain (spring) measures 30 inches in length and can be cut to any size. LAUNDRY and TRASH Chute Door compliant. An inspection in your basement will require this part. Hardware for vertical HOPPER, horizontal ROLLING (HRD), GUILLOTINE and ACCORDION Discharge Doors NFPA code construction compliant. UL Listed / Fire Rated at 165 degrees (Fahrenheit) temperature. Pro Chutes Guarantee - BUY WITH CONFIDENCE - 3 Month "No Questions Asked". If past the Amazon return window, please contact us directly through Amazon.