Serological pipettes manufactured from high quality optically clear polystyrene. Internationally color coded for easier size identification. Pipettes are equipped with a high quality filter. Pipettes are free of detectable RNase/DNase, pyrogen and DNA. Pipettes are sterile R and non-cytotoxic. Minimal meniscus formation feature delivers optimal measurement values. Enhanced ease of use - all nerbe plus serological pipettes employ ascending and descending graduations. The polystyrene used maintains fast flow.