XO RBA by WICK'D Constructed out of stainless steel and sand blasted for a matte finish, the XO RBA is a great blend of affordability and great design. Included with the XO RBA are 5 airflow pins, allowing you to get the exact airflow you prefer.  This bridge perfectly pairs with the WICK'D XO Boro Tank, but will fit into any standard boro tank.  Product Includes: 1 x XO Boro Bridge  1 x Allen Key 5 x Airflow Pins (1.0mm, 2.5mm, 3.0mm, 3.5mm,4.0)