Home Wholesale Discount 2Pcs 25ml PH 4.00/6.86 Meter PH Buffer Calibration Kit Buffer Solution Potassium Chloride Wholesale - March 16, 2019 Special Promo 2Pcs 25ml PH 4.00/6.86 Meter PH Buffer Calibration Kit Buffer Solution Potassium Chloride with FREE Shipping Worldwide! Rating : / 4.22 US$6.69 Original Price: US$6.69 Buy on Banggood Product Description SHARE ON Twitter Facebook Whatsapp Pinterest Tags Wholesale