Product details:

CURT Receiver Tube Adapters are made to adapt a receiver opening to a different size. Adjust your receiver from 1 1?4' to 2', 2' to 1 1?4', or 2 1?2' to 2'. Receiver tube adapters work great to tow a cargo carrier, bike rack, or ATV hitch hauler. Gross tow weights (GTW) are available from 3,500 to 8,000 lbs. This high-quality CURT product is finished with a durable powder coat for added rust resistance.