1.Die for feed machine 2.About twenty years experience ... -energy machinery with about twenty years experience. pellet ring die 1. alloy steel ,mould steel and stainless steel 2 ... and parts research, design, production and services.(ring die, flat die, matched die, sawdust special mode, feed, fertilizer specific model) . ... a mature stage. The basic type of ring die:200—600Hole diameter:Φ1.1mm—Φ12mm