This is a Pipe Light Half-kit for Replacing a single Incandescent Pipe Light. The Oval Light sits sonicly sealed inside a PVC housing, which mounts directly onto 2 inch pvc (measures 2 3/8 Outside Diameter), and can be adapted for other sized pipes. The Light performs Turn signal, Braking function, and Running lights. The Pipe Light Housing also features reflectors on the rear of the housing to assist in reversing. Whats included: One Pipe-Light PVC housing, One Incandescent 6 inch Oval Light, One Side Wiring Harness.