RailMount 32-41 The RailMount 32-41 is specifically designed for both circular AND square 32 mm (1.25 in) rails, 41mm (1 5/8) round rails such as those found on Hobie kayak outriggers, and the multi-sided Hobie H-Rails Preferred mounting base of Hobie Adventure Island and Pro Angler owners. Accepts any RAILBLAZA accessory Features slide locking mechanism Installation hardware included