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Genuine Napoleon 4″ inner / 7″ outer flexible direct-vent venting: GD-220 and GD-330 flex kits, GD-222 and GD-222R wall terminals, ST47U Silhouette terminal, GD-110/111/112 roof terminal kits, firestops, couplers and sealant. This is the only venting listed for Napoleon Ascent, Ascent Linear 36/42/46, Ascent X 36 and Napoleon direct-vent gas stoves.
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