The material of the air column roll is PE+PA, the company will customize the column width, height and film thickness according to the needs of customers. Regular film roll is 300 meter per roll. The membrane was fabricated using patented technology of one-way valve. It is composed of multiple independent air chambers by heat sealing, using air as the filling medium. Plastic wrap air column roll uses eco-friendly material, non-toxic and odorless , it features high-pressure inflation, automatic air lock and strong cushioning performance. At the same time, it can become anti-static , light-proof, anti-counterfeiting, and other functions through formula adjustment.