Heavy - (of slumber) deep and comprehensive; "a heavy sleep"; "fell right into a profound slumber"; "a sound sleeper"; "deep wakeless snooze" Types 0110DOW, 0120DOW, 0110GOW and 0120GOW are "outside of wall or floor" integral sleeve static curtain variety fire dampers.  Product 0110GOW and 0120GOW are specifically suitable for offer https://augustiaocp.bloggerswise.com/44623902/heavy-duty-stainless-steel-damper-manufacturers-no-further-a-mystery