ProBox has a patented insert mechanism that allows the cant angle to be adjusted by swapping out the insert!
Currently there are 4 different insert angles available, each of the angled inserts are a different color so that they can be easily identified. Current angles: BLUE - 0°, RED - 4°, BLACK - 6°, and WHITE - 8°.
Inserts are sold separately in pairs.
ProBox also provides positive buoyancy insert plugs that can be used to plug off a box in order to reduce drag if the boxes are not being used. This is handy for 2+1 fin setups or multi-fin boards where some of the boxes might not be used at certain times.
These plugs are sold in WHITE and BLACK to match the boxes, sold separately in pairs.