Raspberry Heatsink Pi 4B for PCB Aluminum Silver Heatsink 4 sets With Adhesive Tape Aluminum Cooler

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We are a manufacturer makes heatsink for 15 years. Including the aluminum extrusion/ brass cnc machining, cnc turning, stmaping,extrusion, die casting, metal sheet forming. Hope you can accept me as a friend. Thanks.
We a professional manufacturer for heat sink of China, we are good at making the OEM heat sinks and have been focus in this field for 15 years.
We have our own workshop and advanced facilities which including the stamping machine, extrusion line, auto bending machine, Auto CNC machining, auto drilling and taping machine, auto polishing line, anodizing process, electroplating process etc. The surface can be treat very nice and the tolerance scope for some precision parts can be reach is +/- 0.005 mm, the surface treatment can be anodized to different color.
More detailes just contact me via +8613423161110. Thanks.