NOS New Profile Design RMC Rear Mount Carbon Storage w/ Dual Water Bottle Cage.

Profile Design RMC Rear Mount Carbon Storage w/Dual Water Bottle Cage: Carbon fiber rear drink system with accessory mounting straps. Extra storage area has room for accessories. Compatible with standard 7mm saddle rails.

Weight: 120 grams (w/o cages)
Securely holds water bottles out of the wind

Actual item pictured.  Email with any questions and thanks for looking.