999 6-1/4" X 22" Box Newel Sleeve. Fits any wood 4-3/4" blanks or the 993 box newel posts. Sleeve wall is a traditional 3/4" thick. With the sleeve the post matches the 991 plain box newel post.
Available in Red Oak, Hard Maple, White Oak, Euro Beech, Poplar and Alder hardwoods.