Check the listing for details. Bonded leather book binding material,Black,blue,burgundy, mahogany. Condition: New. Listed at 6.50 USD. Bonded leather for book binding,All measurements are in inches Standard thickness. Approximately. .35 millimeters or .014 inches or 14 point Temper. Softness 20 is standard Weight. 1 pound per linear yard bonded leathers have the look, feel and smell of Genuine Leathers because they are tannery made; produced on the same equipment using the same methods as genuine leathers. The cowhide fibers used to make bonded leathers come from the tanning process when the hides are brought to a uniform thickness. The fibers are bonded with natural latex on very unique machinery. As a result, Bonded Leathers are soft and smooth with a true fine leather aroma ,bonded leathers are produced in continuous rolls, which can be shipped either in rolls or in sheets.