THIS IS A NEVER USED VINTAGE HUBBA LIGHT MADE TO CLAMP ONTO THE FRAME RAIL AS A TAIL LIGHT. BUT I HAVE SEEN THEM USED ON MANY PLACES ON A BIKE. IT'S COMPLETE WITH CLAMP, THIS LIGHT TAKES A D SIZE BATTERY, HAS A GREEN LENS. THE TAIL LIGHT JUST UNDER 5 INCH LONG AND THE CLAMP IS ABOUT 1-3/8", GREAT FOR SCHWINN BIKES AND OTHERS, THIS IS A ORIGINAL VINTAGE LIGHT IN GREAT CONDITION. THIS LIGHT SET IS JUST ASTONISHING.