The Preston Innovations Offbox 36 Spacer Bar is designed to position side trays and other accessories around your seatbox, creating a more versatile setup and optimizing the use of your peg space. It includes inserts for 30mm round, 25mm round, and 23mm OffBox fittings. This spacer bar is part of the latest generation of seatbox accessories, evolving from the popular Offbox Pro range.