VOL-SP-4.2 is an optional spindle for an extended viscosity range. It is especially suitable for sample volumes of 3.8 ml. It is required to use the 4.2 ml chamber VOL-C-RTD-3.8 in combination with the VOL-SP-4.2 spindle. The chamber is available as accessory. VOL-SP-4.2 is an optional spindle for an extended viscosity range. It is especially suitable for sample volumes of 3.8 ml. It is required to use the 4.2 ml chamber VOL-C-RTD-3.8 in combination with the VOL-SP-4.2 spindle. The chamber is available as accessory.