... No burrs. The core components of isolator.The material is copper,brass or phosphor bronze.The surface ... requirement of flatness, burr,dimensional precision(±0.025mm),material thickness,plating and so on.Especially, plating ... the etching parts, we can:1. The defferent raw material :Iron and iron ally(such as spcc,sus) ... : ± 0.02mm (according to the thickness of material), It's about 18%T.7. No burrs; ...