The "PIVOT-GEAR Training Jab" is a javelin for practicing the javelin throw. Since those used in official competitions are expensive, this is a cost-effective practice model that you can use without worry. It has a small margin of error in shape, weight, and center of gravity compared to those used in official competitions, making it less likely to throw off your feel. It weighs approximately 300g. It's popular and has been featured on YouTube and TV. It's used as a training tool by professional baseball players and high school baseball teams, and is highly effective for correcting and strengthening throwing motions. Here's what sets the PIVOT-GEAR Training Jab apart: It's a reasonably priced model with specifications almost identical to those used in official competitions, making it ideal for practice. The tip uses soft PVC material and is replaceable, and the main body is made of durable PP, making it difficult to break. It can be disassembled for easy transport, and a storage bag is included. The total length is 69cm, and when disassembled, the parts are about 35cm. I've only used it once and have kept it stored in the box. Please understand that this is a used item. *The actual item is shown in photos 3-5, and the color is yellow. Shipping will be done by attaching a shipping label to the box in photo 3, so please be aware of this.