Williams Thin-Wall Collar Kit for Direct-Vent Heaters

Williams Thin-Wall Collar Kit for use when wall thicknesses is between and 5 in. Designed to fit with all Williams Direct-Vent models. Used to increase thickness with wood strips are undesirable.|Installs with vent kit on direct-vent models 1403622, 1403621, 2203622, 2203621, 3003622 and 3003621|Constructed of durable metal|To be used with Williams furnace vent cap assemblies only|Original factory part