These strong, durable doors provide extra rider protection from the weather, dirt and debris, and their windows can be opened as desired for airflow and exterior access. The doors can only be used with the following cab accessories: Poly Cab Windshield 2879108; Glass Windshield 2879747; Poly Roof 2879109; Rear Panel 2879950. Features strong, durable structural web injection-molded shell with polyethylene construction and profile tubing and plastic design to create a sealed perimeter with a vehicle matching finish. Door is backed with sound-absorbing insulation material. GEM vehicles require cab frame 2880203.