... accept 4. ISO9001 2008 certificate Colorful Automatic Valve Used on Storage Bags Features 1. material: PP, PE, POM ... of valve 3. color: pink, green, blue, white, black, coffee, yellow 4. certification: ISO9001-2008 5. kind: ... and molding developed by Japan Function Be used on compressed vacuum bags, to help suck out air ... -300 units per polybag, then put into export paper carton. Payment Terms T/T, L/C, ...