Swivel Mount Wake Tower Speaker Clamp - Pair Install your Signature Series Wake Tower speakers with ease, using the Universal Swivel Wake Tower Brackets. These brackets are designed to securely fit a range of wake tower pipes, with inserts included to suit: 63.5mm (2-1/2'), ø 60.3mm (2-3/8'), ø 57.2mm (2-1/4'), ø 50.8mm (2'), ø 48.3mm (1-29/32'), ø 42.2mm (1-21/32'), ø 33.4mm (1-5/16') sizes. Compatible With: Fusion Signature Series Wake Tower Speakers (SG-FT88SPC and SG-FT88SPWC) Warning [https://productimageserver.com/prop65/6pt.png]WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov [http://P65Warnings.ca.gov].