Material alluminum alloy, qq-a-200/10; 4.060 in o/a diameter on ring; 1.210 in diameter at base; 3.060 in diameter at top; 3.250 in center to center on 2 mounting holes1.83 in diameter on top cavity; 0.630 in diameter on bottom cavity; 3.000 in o/a h; used on m393a2