The McSparr Cobb testerster is used for cabcobb resistance of the paper. It consists of a brass cylinder of known inside diameter and length. It has a metallic plate, which is used for clamping the one side of the cylinder with the help of the bracket and bolts. The metallic plate, which is used for clamping purpose, is paste a rubber sheet for the perfect clamping. The whole assembly of the cylinder and clamping arrangement is pivoted so that easy and fast pour off the water takes place. A brass roller of specified size and shape is also provided with the instrument. The equipment is designed to give a long and trouble free life. The components are brightly polished and bright chrome plated.