Check your wakeboard tower tubing clamp size for all towers here. If you are not sure what your tubing size is just

use the directions here to calculate it:

Calculate your clamp size:

Circumference (inches)     Diameter (inches)3.927                                    1.250 (1 1/4)4.712                                    1.500 (1 1/2)5.105                                    1.625 (1 5/8)5.498                                    1.750 (1 3/4)5.890                                    1.875 (1 7/8)6.283                                    2.000  (2)7.069                                    2.250 (2 1/4)7.461                                    2.375 (2 3/8)7.854                                    2.500 (2 1/2)9.425                                    3.000 (3)