NDS 1011-15-KC1500S 1-1/2 in. 1-1/2 in. Slip X 1-1/2 in. Slip PVC Spring Check Valve ETi Solid State Lighting duct opening: 19-3/4" x 19-3/4" UL cUL Yes
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Ships within 48 hours · Estimated delivery Nov 15 - Nov 20