**Demo Models are all New Models - They have never been used we just do not clean the pipe to make them shiny and white. The pipe will have scuffs and print on it like you see in a Home Depot or Lowes . It does not affect the machine in any way.**
The Super Swing Trainer comes in 2 sizes:
Medium fits golfers 4'9" to 5'9"
Large fits golfers 5'9" to 6'5"
If you are sharing a swing trainer and one person needs a large and one person needs a medium you should get the dual ring model. It is a large swing trainer with a snap on ring that turns it into a medium model.