Durable plastic case suitable for most of our optical refractometers with length is less than 175 mm (the gap the foam has this length).
If you do not want to buy it as a spare part it is not necessary to order it - it is a standard part of each our optical refractometer.
Not suitable for models: RAL1, RAL2, RBR10, RUR5 and RSA1. These models are longer and have another case.