"ALUMINUM ALLOY QQ-A-225/9 COMP 7075 COND T73,ANODIZEFINISH PS13201 TY 1 CL 1,3.997 IN. MIN TO 3.998 IN. MAX O/A DIA,0.198 IN. MIN TO 0.202 IN. MAX THK,3.575 IN. MIN TO 3.585 IN.MAX DIA BORE THRU,AS NOTED MACHINED SURFACES 32.0 63.0 AND 125.0MICROINCH FINISH"