... . VALVE STEMS 25 50 100 200 500 1000 3000 5000 10,000 TR-412 X 3/4''...... 23 20.9 19 ... .9 19.5 18.9 18.5 17.9 ea TR-418 X 2 ......... 25. 24. 23.5 22.5 ... .5 19.5 18.9 18.5 17.9 ea TR-425 X 2 .......... 35 29 27.9 26.9 ... 25.9 TR-600 HP X 1/14 34 30.9 29.9 ... 28.9 24.5 TR-412, TR-413, TR-418, HP-600, HOLE SIZE= .453 TR-415, TR-425,............................. HOLE SIZE= .625 ...