Aluinum alloy, qq-a-225/8, alloy 6061-t651; 6 cylinder ports; 3 pressure ports; 2 return ports; 3000.0 psi working pressure; lubricating oil media per mil-l-17331 2190; 12.750 in. O/a lg; 8.440 in. W; 5.380 in. Thk; body anddized per mil-a-8625 type 1 class 1