Double sided PCB board Suitable for experiment, electronic designing and DIY, etc. Thickness:1.6mm Front: pin distance about 1.27mm/0.05" Back: pin distance about 0.65mm/0.03" Two sides' pin hole distance: 7.62mm/0.3" Board size: length is 10.92mm/0.43", width is 10.16mm/0.4" Main color: green When confirming that the number of pins is sufficient, a quick confirmation is only necessary to check the size of pin pitch, chip and pad width The detail size please pay attention to the picture Package include: 50 pcs adapter PCB board