Flat plate attachment of steel, qq-s-766, class 302, size .03 by 1.12 by 1.12 with two mounting .171; tube of steel, mil-t-8808 type 2, class 321, size. 250 od w/.016 wall by 4.0; detent is off steel, qq-s-763, class 302, size .44 diameter by 1.8; this assembly is used for automatic oxygen release