This a tennis ball thrower for your dog! If you have horrible throwing skills just like me, this will allow you to meet all your dogs fetching needs. You are able to print as many mi-section pieces as you want to make the thrower as along as you want! This can cost around $4.50 to 3D at retail, you can pay around $10. However, with the ability to customize the length of this thrower, you can use it inside with small children, elderly family members, or if limited arm mobility is present.