 | 13400 This Acid-Test-Kit includes 5 bottles to make 5 checkups of refrigerant-oil to find out if acid or o.k. Put 12 drops of oil into one bottle; color of the liquid will change to – yellow= acid, no good – green = still o.k. – blue = very good oil o.k. Can be used for mineral and synthetic oils. Part No 9881446 |