High Quality FR-4 Glass Fiber Dot Matrix Double Side Prototype Printed Circuit Board (PCB) Size: 90mm x 150mm, Total Holes: 1560 (30x42) + 28x2 (56) Oval Pads Both Side, Hole Diameter : 1mm,Pitch: 0.1" (2.54mm) , Thickness: 1.56mm, Material : FR-4 (glass fiber) .