Buffer A4 Concentrate (600 mL)
https://www.genesapiens.org/shop/rw2-740914-3-buffer-a4-concentrate-600-ml-331821
https://www.genesapiens.org/web/image/product.template/331821/image_1920?unique=8b4e79e
This Buffer is guaranteed a A4 with the use of Concentrate and directly supplied (600 to your lab by Gentaur's warehouse.
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30-day money-back guarantee
Shipping: 2-3 Business Days