Introducing the Gas Guard, a vintage auto gadget manufactured by Chesterfield Industries in the 1970s. This unique collectible item was designed to prevent gas theft from siphoning. Made in the United States. It is an amazing addition to any vintage, retro, or mid-century collection. The Gas Guard states a 24 hour gas tank protection and is a must-have for any car enthusiast. Simply screw into filler pipe with a long screwdriver. East installation. Packaging dirty or staind from years of storage. Free shipping!