"MATERIAL STEEL O/A; ONE END THREADED FOR ADJUSTING SCREW 0.500-20 UNF-2A RIGHT HAND THREAD SIZE; OTHER END HAS ADAPTER FOR VALVE STEM; ARM IS PRESSURE LUBRICATED, HAS BEARING INSERT AND COMES EQUIPPED WITH LOCK NUT; ADJUSTING SCREW 1.5 IN. FROM PIVOT CENTER; VALVE STEM ADAPTER 3.0 IN. FROM PIVOT CENTER; 1.875 IN. BORE"