Company: Qingdao Sanrun Packing Products Co., Ltd.
Address: NO.305,Century Street, Economic evelopment Zone, Qingdao City, Shandong Province, China.
Tel: +86-13165067585
Email: annie@srwovenbag.com
This vavle bag is usually used for packing cement , mortar.
It has the external valve and internal valve.
After fullfill the material , the valve can be closed automaticly.