This great DIY Kits is for a great welding practice plate to enhance your experience and unparalleled inspiration. The left and right 3 columns of components are used to practice welding, and each column has test points. The back side of the circuit is also used, with a ruler to facilitate the measurement of components. After welding, just connect electricity (3-12V) to see the effect. You can quickly judge the welding effect. Colour:blue Material:PCB Size:15 x 7.4 x 1.2cm Package Contents: 2 x Training DIY Kit Only the above package content, other products are not included. Note: Light shooting 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.