Inquiry (采购产品): plastic tube for prototype material: any plastic film like those baloons made of Mylar. very thin, very light, tear resistant,capable of being air tight. sleve, made of plastic film 2 inches in dia. and 50 feet long. when filled with heliem, 50 ft .2 inch baloon tube will rise straight into the air. looks like a standard baloon only 50 foot long. **** Hidden Message ***** bill johnson 90045 Company: aar security E-mail: billjohn1307@yahoo.com **** Hidden Message ***** billjohn1307@yahoo.com