Jack Richeson Cross Brace for Best Heavy Duty Stretcher Bar Center Notched, 40-Inch Made in usa, by wisconsin craftsmen, for the finest artists in america Pine braces help keep your frame straight and square Lengths from 8-inch to 144-inch SOLD SEPARATELY, Jack Richeson's BEST Cross Brace Brackets, one pack of 2 REQUIRED per brace We recommend cross braces for stretcher bars over 36-inch in length