Feature: and The Special Pingpong: Showing Hit Rate and Degree of Rotation The Connecting Shaft: Ensure the Consistency of the Ball Trajectory The Buffer Spring: hitting the ball quickly Rebound to ensure continuity The Base: Fixed Position to Meet Different Demands of Practice Material:PVC Color: As picture shown Max Clamp Size: about 5.5 cm / 2.17 inch, and Standard Table Tennis Table Thickness is About 4 cm / 1.57 inch. So it will Fit most of Table Tennis Table Types 1. Sucker Base Straight Type, You can Put the Robot on the Position of any Point of Table. Fit for Central Table Position Stroking Practice. 2. Clamp Base Straight Type, You can Fix the Robot on the Edge of Table, Fit for Close-to-table Stroking Practice. 3. Sucker Base Goose Type, You can Put the Robot on the Position of any Point of Table. Fit for Central Table Position Stroking Practice. 4. Clamp Base Goose Type, You can Fix the Robot on the Edge of Table, Fit for Long Distance Over Table Stroking Practice. Package Included: 1 set of table tennis trainers Note 1.Our size are Asian Size,1-2 size smaller than euro size,please choose your size according to the size chart. 2.Due to the hand measurement, there have size error about 1-2 cm.Item color displayed in photos may be showing slightly different