PH instruments are calibrated to pH 7.0 first (buffer) then to pH 4.0 (slope)
Store in a cool place out of direct sun and heat
They should be stored with the lids securely tightened

Technical Details

Product Details

Package Dimensions
Width : 2.91 inch
Height : 2.68 inch
Length : 5.43 inch

Shipping Weight: 14.4 ounce (View shipping rates and policies)

ASIN : B01ESX3A2Y