"ALUMINUM ALLOY QQ-A-225/9 T651 COMPOSITION 7075,1.750 IN. O/A LG,1.100 IN. O/A W,1.230 IN. O/A H,MACHINED SURFACES 125 MICROINCH FINISH,2 PIECES AS A MATCHED SET,2 MOUNTING HOLES 0.191 IN. MIN TO 0.196 IN. MAX DIA,1 CUT OUT FOR CONTROL HOUSING BEARING 0.393 IN. RADIUS IN EACH PIECE"