GTE TEST ACID NEUTRALIZER 1/2 OZ ACID TEST STONE This kit includes: - 1 bOTTLE OF GTE NEUTRALIZER SOLUTION (1/2 OZ PER BOTTLE) - 2''x2'' GTE Jewelry Streak Scratch Stone with rubber backing for non-slip desktop testing This authentic GTE Acid test Neutralizer is perfect for cleaning your test stone in between testing as to not contaminate results. Protect your fingers, clothing, and personal items from staining and potential burns with a few drops of the neutralizer! Simply use the convenient dropper bottle and squeeze 1 drop of the Neutralizer formula onto your test stone. Blot with a paper towel to prevent cross contamination with previous tests. Made in USA.