0, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5-SP4
Ductile Iron
2 to 4, 4-1/4 to 5-3/4, 6 to 7-1/2, 7-3/4 to 9, 9-1/4 to 12-1/2, 12-3/4 to 15-1/2, 15-3/4 to 19, 19-1/4 to 22, 22-1/2 to 26, 26-1/4 to 30, 30-1/4 to 36
2, 5, 7, 10.5, 17, 20, 32, 38, 50, 62, 63