... High efficiency 4)Competitive price We can provide various Heat Sinks as per customer's design, welcome to ... send inquires. sheet metal progressive stamping heat sinks1. Provide in-house design 2. Accurate dimension 3 ... plastic etc.Making process:Stamping, deep drawing, bending, punching, laser cutting, threading, welding , tapping, riveting, grindingSurface treatment:Hot galvanized, ...