National Standards for Grade Levels 6-14
 
Calibrate pH meters with our color coded buffer solution set. Includes 500 ml bottles of each buffer; pH 4.0. pH 7.0, and pH 10.0 and electrode cleaner. All buffers are ±0.01 at 77ÆF (25ÆC). 
 
BU5004-P, Buffer pH 4.0, 500 ml bottle. Sh. wt. 1.5 lbs.
BU5007-P, Buffer pH 7.0, 500 ml bottle. Sh. wt. 1.5 lbs.
BU5010-P, Buffer pH 10.0, 500 ml bottle. Sh. wt. 1.5 lbs.
ES9470-P, Electrode Cleaner, 500 ml bottle. Sh wt. 2 lbs.