"STEEL,MIL-T-6736 COMP 4130; CHROME PLATE OUTSIDE ONLY,PER GSS 8.250 CL 2; 9.000 IN. LG; 0.625 IN. OD; 0.035 IN. WALL THK; TWO HOLES 0.186 IN. MIN AND 0.192 IN. MAX DIA,0.750 IN. CENTER TO CENTER,FIRST HOLE IS 0.375 IN. FROM END; INCLUDED WITH TUBE IS ONE RIVET,P/N MS20600-AD4,PERPENDICULAR TO THE TWO HOLES AND 0.250 . FROM SECOND HOLE"