Features: High-quality practice board,can withstand repeated desoldering,can improve the efficiency of use. This product is improved and optimized based on years of experience.The circuit board design is scientific and reasonable. After welding,you only need to turn on the electricity to see the effect,you can quickly judge the welding effect. This product is the welding DIY practice board,can fully exercise the hands ability,can constantly improve the welding level and speed. It is suitable for electronics students and enthusiasts to conduct welding practice,and also suitable for electronic assembly competitions. Specifications: Size:70 x 57 mm / 2.76 x 2.24 inches Thickness:16 mm / 0.63 inch Note: Please allow 1-2cm errors due to manual measurement. Because of the different display of each computer, the pictures may not reflect the actual color of the item. Package includes: 1 Piece Welding Practice Board