This ring die Van aarsen C600 is for pellet machine Van aarsen C600,for feed pellet producing. Our factory is a professional manufacturer of ring dies with more 30 years experience. Every year, we make around 8000pcs dies for both feed pellet producing and wood pellet producing. Material: Stailess Steel/X46Cr 13,High Chrome steel Inside diameter: 600mm Hole dimater: 3mm-16mm HRC: 52-55 After heat treatment