Set of 5 McFarland standards, user calibration of densitometer

For use with DEN-1 (ES59809) and DEN-1B (ES59809P) Densitometers. The Liquid McFarland Standards Set is supplied in 16 mm diameter glass tubes.

Features: 
- Supplied in 16mm ø glass tubes 
- 0.5 / 1.0 / 2.0 / 3.0 / 4.0 can be decanted into an alternative tube (shelf-life no longer valid) 
- Requires D16 adaptor, supplied with DEN-1 / DEN-1B