"Beehive" Brick Kiln. 63mm tall. 87mm in Dia.This type of kiln was connected to a chimney via an underground flu. 4/059 represents a smaller chimney suitable for servicing a single or pair of kilns whereas 4/059A models a larger chimney for use with 3 or more kilns. Such kilns would often be positioned in small clusters around their particular chimney.