... dust and liquid 4. economic type JINHUA HENGFA TOOLS CO., LTD is a professional Personal Safety Equipment ... Dust Mask, Respirator, Earmuff & Earplug etc,JINHUA HENGFA TOOLS CO., LTD established in 1999 with a small parts ... assembling facility. After several years development, HF TOOLS cover an area more than 10,000 square meters ... cutting and brazing operations6.flip-up front design ,easy to work