ITEM	QTY	DRWG PART NUMBER	DESCRIPTION	DRAWING / SPECIFICATION / MATERIAL / VENDOR PART NUMBER
1	4"	vendor pn 88805K41	Alloy 6063 Aluminum 90 Degree Angle 1/16" Thick, 1/2" X 1/2" Legs, 8' Length	http://www.mcmaster.com/