Adapter required for measurement with a concentric cylinder (CC), double-gap (DG) or SSA (SC4) measuring system if not using PTD 80.Use with Measuring System CC12 item NC1818606, CC18 item NC1818604, CC26 item NC1818602, CC12/D18 item NC1818608, SC4-18 item NC1818611, SC4-21 item NC1818613, SC4-27 item NC1818615, DG26 item NC1818619, or DG26/SS NC1818621Suitable for use with Anton Paar rotational viscometers ViscoQC 100 – L item NC1818559, ViscoQC 100 – R item NC1818567, ViscoQC 100 – H item NC1818569, ViscoQC 300 – L item NC1818572, ViscoQC 300 – R item NC1818576, ViscoQC 300 – H item NC1818578.