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Maosifang 7x9CM 9X15CM Double Side Universal PCB Printed Circuit Board Prototype Kit for DIY Soldering Experiment and Electronic Designing Product Specifications: Size:7x9CM and 9X15CM Thickness:approx. 1.6 mm Hole pitch:approx. 2.54 mm Hole diameter:approx. 1.0 mm Material:FR4 glass fiber, pre-tinned holes Package includes: 2 x 7x9CM Double sided PCB board 2 x 9x15CM Double sided PCB board Customer Service: If you have any problem of our product,please feel free to contact us.We will provide professional pre-sales and after-sales service,and we will try our best to help. Product Warranty: 100% quality warranty,if the product in the course of any problems or you are not satisfied with our products, we will return the unconditional refund, please do not worry about your money.