sheet metal progressive stamping heat sinks 1)Progressive Die Stamping 2)Customized 3)High efficiency 4)Competitive price ... to send inquires.sheet metal progressive stamping heat sinks1. Provide in-house design 2. Accurate dimension 3. Favorable price ... , carbon steel, aluminum, zinc, brass, plastic etc.Making process:Stamping, deep drawing, bending, punching, laser cutting, threading, welding , ...