... ISO9001 ISO14001. Gerresheimer Shuangfeng mainly produces injection vials, siliconized vials, ampoules and cartridges with ideal hydrolytic resistance, resistance to thermal, shock, freeze ... inquiry! Thanks ..Gerresheimer Shuangfeng mainly produces injection vials, siliconized vials, ampoules and cartridges with ideal hydrolytic resistance, resistance to thermal, shock, freeze ...