This handy bar allows the correct positioning of trays and other accessories around the seatbox. Any Preston Offbox accessory will fit onto it with a 19mm square insert.
Supplied with 30mm round inserts. They will fit 36mm round with inserts removed.
Inserts available for 25mm round & 23mm XS square inserts.
Original Offbox pro inserts can be used by fitting inside the 30mm insert.