Blast Gate, For Nominal Duct Diameter 8 in, Body Material Grade Type 1, Body Material PVC, Overall Length 6 3/8 in, Product Type Manual Blast Gate, Blade Material PVC, Maximum Temperature Rating 140 Degrees F, Seal Material Not Applicable, Standards Cell Class 12454, ASTM D1784, Inside Diameter 8 5/8 in, Color Gray, Air Inlet Size 8 5/8 in