... : PP 3. OEM accept 4. ISO9001 2008 certificate Colorful Automatic Valve Used on Storage Bags Features 1. material: PP, PE, POM 2 ... . size: one size for each kind of valve 3. color: pink, green, blue ... Ninja valve, switch valve, slide valve, automotive valve 6. design and molding developed by Japan Function Be used on compressed vacuum bags, to help ...