You decided to go with a fully customized BCD concept that Aqualung provides with the ModLock technology Rouge Backpack Style BCD so, you started with the air cell (see SKU: UDRRAC) and now you need to choose a Back Assembly. Made from durable proprietary fabrics, webbing and impact resistant hardware the Back Assembly is available in three sizes for complete customization and will fit any of the air cells you choose. The Back Assembly comes equipped with the lower torso adjustment straps that mate with the upper torso straps found on the Rogue Shoulder Assembly (see SKU: UDRRSA). Two D-rings for accessory attachment are also included with the back assembly.The Back Assembly also includes Aqualungs GripLock Tank Band. This band is a strong, secure way to attach the cylinder to the BC. Gone are the days of complicated web weaving through multi-slot buckles. Predetermined detente settings make set-up simple. No adjustments are necessary when switching cylinders of the same diameter. Best of all, you don't have to worry about pinching your fingers with GripLock's innovative finger saver feature. ModLock connectors easily click into place and are simply unlocked with a small tool such as a key or pen. Comes with assembly instructions.