20pcs PCB Prototype Board Circuit Protoboard Universal Stripboard Prototyping Veroboard 2X8 3X7 4X6 5X7cm 5Pcs Each Mixed Double

20pcs PCB Prototype Board Circuit Protoboard Universal Stripboard Prototyping Veroboard 2X8 3X7 4X6 5X7cm 5Pcs Each Mixed Double

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