The Fly High Yamaha Jet Boats Custom 21 FatSac is designed to be tied down to the swim platform step of your 21' Yamaha, adding 725lbs to the rear of your boat so you can get wakesurfing.

Applications: Fits 2017 and newer 21' Yamaha Boats.

How to use it: BEFORE filling the bag with water, fill the bag with air to establish your tie-downs to secure the bag. Once you've established your tie-downs you can fill the bag with water and be confident the bag will stay in place.

Fly High Yamaha Jet Boats Custom 21 FatSac Features

• Includes plug and W730 fitting for use with the Fly High FATSAC Supa Tsunami Pump
• Includes 4 built-in handles so you can secure this to the platform (tie-downs not included)