PP. Translucent, moulded graduations, with reservoir beaker and pouring lip. For density measurement using a hydrometer. Hydrometer can be read through the overflow vessel with a completely filled cylinder. With a raised scale and ring marks at the primary scale points, calibrated 'In'. Class B tolerances according to DIN 12681 / ISO 6706. Hexagonal base with bottom studs provides high stability. Thermal stress up to 80 °C does not cause tolerance limits to be permanently exceeded.