C-Line Products - C-Line - Heavy Duty Index Sorter, 31 Dividers, 2 1/2 x 25 1/2 - Sold As 1 Each - Sort and file purchase orders, invoices, checks, letters and other office documents. - Heavy-duty pressboard construction. - Insertable metal tabs and plastic windows. - Five indexing systems on 31 letter-size dividers. - Dividers labeled A-Z, numerical (0-2000), January-December, 1-31 and Sunday-Saturday.