This is a standard plastic rear hub carrier for the RO1.0. It comes in a set of two, with the same shape for the left and right.

Supported Chassis
ROR-010 / ROR-010RTR / ROR-010RTR-1 / ROR-020 /
Compatible Chassis (Optional)
B-YZ2CAL3 / B-YZ2CAL31-1 / B-YZ2DTM3 / B-YZ2DTM31-1 / SOR-010 / SOR-020 / SOR-020D / SOR-030 /