While we have 2 different models - Model FB with a long bed trapeze and Model TB with just a triangle trapeze. However 95% of our customers prefer the Model FB with the long bed trapeze. They enjoy grabbing anywhere on the length of the trapeze and it not moving down or adjusting when using it. It also helps them move easier across a wide bed. Both of our models allow the medical trapeze to move the length of the bed to what works best for our customer, however when pressure is applied the trapeze stays still.