Yishang is an excellent enterprise integrating design, manufacture, sales, and service.
It can provide custom sheet metal processing services for iron, galvanized steel, stainless steel, and aluminum materials.
Yishang has fully utilized its 22 years of technical experience to save production costs for its customers and provide 100%
inspection-free products.

We have a strict quality management mode, it includes 9 procedures: schedule an order-generate the technology production
CAD drawing-purchase raw material-production-QC-installation-encasement-loading-sealing. We have a professional team that schedules the new order, reports the old order, and makes sure the quality and delivery time every day.
 Product Detail:
The recess is stamped out using a CNC punch press and requires a mold.
After stamping, our technical team must check that the dimensions, angles, and holes are correct.
If it does not match the drawing, the mold must be modified within 2 days.


You can choose different sizes and different numbers of vents according to your needs.
If the thickness of the cold-rolled steel plate is 1.0 - 1.2 mm, it is recommended to use 50*10 louver holes for heat dissipation.