... 3.good quality type 4.OEM JINHUA HENGFA TOOLS CO., LTD is a professional Personal Safety Equipment manufacturing factory, with owned ... Earplug etc,JINHUA HENGFA TOOLS CO., LTD established in 1999 with a small parts assembling facility. After several years development, HF ... very hard, which gives guarantee of stable quality and big production capability . 1.good quality type 2.PVC frame and PC lens3 ...