... :40-100/min 4.CNC 110V PCB Milling Desktop Machine (300*300mm) Applications:Can be used for advertisement engraving, advertisement cutting ... :Specifications:1) Machine body: Whole cast aluminum/iron2) Work dimensions: 300*300mm,400*400mm,600*600mm3) Driver type: Stepper motor4) Z ... cylinsrical materials,pls tell us the material diameter.We have 300*300mm, 400*400mm, 600*600mm or make it for you ...