Graduated pipettes, class AS, amber stain graduation, 20:0,1 ml, AR-glass, main point ring graduation, type 2, zero in tip, graduated to the tip, EX (TD) calibrated, acc. to DIN EN ISO 835, from 5 ml on with a cotton plug end as standard, for additional quality certificates, with declaration of conformity acc. to DIN 12600, with dated batch identification.