pH Buffer Calibration Kit 2-Pack — 250 mL (8.4 fl oz) Bottle of Each: pH 4.00 and pH 7.00 | Color Coded
About this item
- Convenient Waterproof Labels
- Suitable for ALL pH Meters
- FREE 'How to Use" sheet included
- Ideal for Hydroponics, Aquariums, Aquaponics and Pools
- Individually Bagged 250 ml (8 oz) Poly Bottles