This case contains 4 x 30 mL bottles of anhydrous acetonitrile.This anhydrous acetonitrile (amidite diluent) comes in a convenient large volume for ABI 394 Nucleic Acid synthesizers, resulting in extended hands-free DNA synthesis. With these larger bottles attached your synthesizer can produce up to 40 average primer-length oligonucleotides with no bottle changes, reducing attended operation time by 50%.