Hi there,I am a buyer from Kumaran Shaji located in Malaysia. I would like to buy Auto Ref-Keratometer Prk-5000 Refractometers.May I know more information about product such as:Brix Min. Div.,Size,Measurement Accuracy,Do you have any quality assurance certificates?Please copy and paste the questions and answers back to me.Regard With ThanksKumaranKumaran ShajiThis Message is from mobile Show More