Compatible with:

10.0 Single Pedal Kayak
12.0 Single Pedal Kayak
13.5 Tandem Pedal Kayak

10.5 Pro Single Pedal Kayak
12.0 Pro Single Pedal Kayak
12.5 Pro Single Pedal Kayak
14.0 Pro Tandem Pedal Kayak

Sold as a single unit.