If you are learning to weld, or you just want to sharpen your skills it can sometimes be costly or difficult to find scrap metal to practice with. That is one reason we decided to put our practice kits together. With your purchase you will receive 12 CNC Plasma Cut - 0.125" (1/8") thick - 2"x4" Aluminum welding coupons. These coupons are great for practicing your lap joints, outside corner corner joints, and t joints