In the circuit board industry, the circuit boards with a thickness of 105 um or more are usually called thick copper boards. At present, the thick copper foils mainly used for printed circuit boards are 3 ounces, 4 ounces, 5 ounces, 6 ounces, and sometime
Inside Screw design to improve our drinking feeling. It's leak proof,you can use carabiner to belong your backbag or put it in side pocket. We accept your color,logo and packing design.