PRO Seat ring You can attach a PRO tank bag to your seat using the PRO seat ringand thus enjoy the advantages of the magnet-assisted mounting system.This is especially useful if you can't attach a tank ring to the front of the tank.The PRO tank ring sits on a fiberglass-reinforced plastic plate that is thenbonded with a rubber base for improved hold. Lashing straps securethe plate to the seat. You can attach the four flat-bottomed PRO tank bag models to the PRO seat ring: you can securely attach Micro, Daypack, Sport and Yukon WP models. Fiberglass-reinforced plastic plate To be used on the passenger seat For PRO tank bags with a straight bottom Included in delivery