The essence of PISCO Volumetric wares are the precise accuracy in calibration. All PISCO Volumetric wares are calibrated in our own well-equipped laboratory with modern calibrated instruments. The class 'B' and 'A' tolerances, as established by IS / BS / ASTM, are strictly maintained. All PISCO brand Volumetric wares of class 'A' tolerances are provided with our works certificate with individual identification and stating actual volume measured/delivered. PISCO graduated Pipettes are made with a specially heat treated process that provides tempered tips and resistance against higher mechanical shocks. Each PISCO Pipette is graduated with lifetime amber colour marks and is extremely resistant to all acids and alkali attack (excepting Hydrofluoric Acid).