gesterinstruments.com,colorfastness to ozone,We rely on our mature after-sales system via GESTER to consolidate our customer base. We own a professional customer service team with years of experience and high qualifications. They endeavor to meet every demand of the customer based on the strict criteria we set up. GESTER provides colorfastness to ozone products that are selling well in United States, Arabic,Turkey,Japan,German,Portuguese,polish,Korean,Spanish,India,French,Italian,Russian,etc. GESTER,Our company main produces flex tester,demattia flex tester,Vertical Flammability Chamber.