... Material:Made in China,42CrMo~50 CrMo*Hardness:=HRC55°The corrugating roll is made of special all steell,came from warindustry ... technic,its life-span can reach18~20milliln meter.High-speed corrugating roll,maximum producing speed is 300m/min.Fing-less out adsorptive ... We are engaging in design,repair,manufacture all kinds of corrugating roll.Technical parameter:TypeACBCBDEFNum.34±238±246±250±286±294± ...