These brackets are designed to securely fit a range of wake tower pipes with inserts included to suit 63.5mm (2-1/2 in) ø 60.3mm (2 3/8 in) ø 57.2mm (2 1/4 in) ø 50.8mm (2 in) ø 48.3mm (1-29/32 in) ø 42.2mm (1-21/32 in) ø 33.4mm (1-5/16 in) sizes.