Wood 36 Compartment Mail SorterDetails Sturdy strength will help you sort! Sturdy Mail Sorters are made of compressed wood with adjustable hardboard dividers. The 36 Compartment Sorter has large slots to accommodate over sized envelopes. Stack up to two high to increase sorting capability. Black plastic molding does double duty, first as an attractive accent to the finish and second as a label holder for identifying the bins (labels are included). Durable laminate finish will