Material for top and bottom: steelsheet or strip, cres, cl304l, 321 or 347, cond a, spec qq-s-766, 18-20ga thk. Material for inlet-outlet tubes: tubing, steel, cres, spec mil-t-6737, 5/8 od x .035-.083 wall or tubing, steel, cres, type i or ii, spec mil-t-8606, 5/8 od x .035-.083 wall.Length 11 7/8, width 10 1/4