Nordfab’s XD Manual Blast Gate allows manual operation and is constructed of a cast aluminum body with a galvanized steel standard connection collar. Sizes 8″ – 24″ are available with Quick-Fit™ (QF) rolled edge ends for easy connection or with flanged ends. Sizes 26″ – 30″ have flanged ends. Standard flanged end is rotational Angle Flanged retained via a vanstone lip.