Designed for optimum coverage, the Offbox 36 Long Mega Brolly Arm features twin knuckles for optimum stability. Easily personalised, the brolly arm can be rotated into the desired position to make your days by the water super successful.With twin knuckles for ultimate stabilitySecures the umbrella to the seatboxCan be rotated to the desired positionDesigned for optimum coverageInserts supplied: 30mm Round, 25mm Round, 23mm OnBoxSize: long