"CAST STEEL,W/STEEL BEARING ADJUSTABLE ARM,1.188 IN. BORE LG,1.250 IN. BETWEEN CENTER OF BORE TO CENTER OF ADJUSTING SCREW,2.000 IN. BETWEEN CENTER OF BORE TO CENTER OF VALVE STEM WEARING FLAT,ARM IS AT A 20 DEGREE ANGLE TO BORE,4.125 IN. O/A LG,2.500 IN. O/A H,1.700 IN. O/A WIDTH"