Right Sliding Side Door Center Roller compatible for CITROËN JUMPER, FIAT DUCATO, PEUGEOT BOXER (Since 2006) 1 x Left or Right Side Door Middle Guide Roller A utility side door center roller is a mechanical part used in the sliding doors of commercial vehicles, such as vans, pickup trucks or trucks. This is a small roller, often made of durable synthetic material, which is mounted on a bracket attached to the middle of the sliding door. The roller allows for easy, smooth movement of the door when opening or closing, while reducing friction and protecting the door and its mechanism from premature wear. The Center Door Roller is particularly important as it supports the weight of the door when closed and provides a tight seal to protect the vehicle's contents from bad weather and unwanted in.