This is the Zeagle BC Removable Zipper Rear Mounted Air Trim Weight System Set (pair) The Rear Mount Weight System feature: ZEAGLE quality Trim weight pockets Improved weight distribution and balance Fits on almost any tank band Release weights as quickly as possible 10lb capacity each pocket for a total of 20 lbs Heavy duty zipper Color Black 8051Z This Zeagle Quality Rear Mount Weight System is designed for the Zeagle BC&';s, but can be used with other BC&';s as well.