Our company produce all kinds of handwheel, Handwheel made of grey iron or ductile iron, for use in drainage and Valve industry. Different sizes can be supplied from 4" to 24". From DN50-DN300.Our round handwheel center hole include: Square hole and hex hole. We have exported these Products to many countries, such as Japan, South Korea and south asia, USA, Europea. Materials: 1) GB/T1348-1988 HT 150-HT250, QT450-10, QT500-7 2) ATSMA536 65-45-12 ASTM 70-50-05 3) EN1563: 1997 EN-GJS-450-10 Our product quality is higher, the price is lower, we can produce all kinds of handwheels according your drawing or sample, welcome the customers of the world do business with us.