Universal test to verify the presence of acid in every AC/R system. ACID-TEST is the professional choice for preventive maintenance and the precise diagnosis of the lubricant acidity. BENEFITS Quick and accurate test of the acid presence in the AC/R system. Universally formulated: suitable for every lubricant. Easy-to-use, immediate result. Eco-friendly and biodegradable. Non-toxic and non-flammable. Inexpensive: one box contains 4 tests.