VOL-SP-2.1 is an optional spindle for an extended viscosity range. It is especially suitable for sample volumes of 2.1 ml. It is required to use the 2.1 ml chamber VOL-C-RTD-2.1 in combination with the VOL-SP-2.1 spindle. The chamber is available as accessory. VOL-SP-2.1 is an optional spindle for an extended viscosity range. It is especially suitable for sample volumes of 2.1 ml. It is required to use the 2.1 ml chamber VOL-C-RTD-2.1 in combination with the VOL-SP-2.1 spindle. The chamber is available as accessory.