Folding design, wide open to speak easily. closed to different facial sizes. Easily to fold and carry.
Easy-breathing exhalation valve with silicon piece inside designed to facilitate air exchange, increase worker comfort., No.8 Building, C Section, Jinhe Garden,
Wuhan Economic and Technological Development Zone, Zhuankou,Wuhan China.
Post Code:430056.Tel: 0086-27- 84252142  027-84252077
Fax: 0086-27-84291755, E-mail:
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