HyDryve II kayak pedal drive system - Pelican Accessories – Pelican Sport
Amazon.com: Wilderness Systems Helix PD Pedal Drive - Propulsion Device for Radar 115 and 135 Kayaks : Electronics
BKC PK14 14' Tandem Sit On Top Pedal Drive Kayak W/ Rudder System, 2 Paddles, 2 Upright Back Support Aluminum Frame Seats 2 Person Foot Operated Kayak - Walmart.com
Bixpy Pedal Drive Adapter for Kayak - Splashy McFun
With 2x Foot Pedal Kayak Boat Tail Rudder Direction Control Steering System Kit | eBay