This item acts as a bridge when attaching a bicycle saddle and stem to a carrier. It's a useful item when you don't want to scratch the frame itself, such as a carbon frame. I purchased this because I didn't want the carbon frame to directly contact the carrier, but I am selling it because I sold my bicycle. - Brand: BN BRACK - Type: Bicycle Carrier - Color: Black - Features: Adjustable design Thank you for looking.