Features: This board replicates almost every common type of solder joint in the FPV world. Perfectly for educational environment, maker space, or home workshops; Suitable for hobbyists, enthusiasts, and aspiring electronics technicians look to hone their soldering skills and unleash their creativity. Each board serves as both a soldering point and a canvas, allowing you to personalizes your crafted from durability metal for long lasts use. 4pack to elevates your flight and electronics projects. Specifications: Color: Black + Gold Material: Plastic + Metal Size:.3x3cm/1.18inch Different batches may have different printed characters, but it not affect the use Package Contents: 4 x Welding Exercise Plate Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.