The perforated rubber two piece band features micro holes for venting and pliability to create an extremely comfortable fit. The specially formulated high performance material ensures durability and long life. This band is designed for our A-2SEL Super Illuminated and our A-2S Ballista which both feature removable hex head lug bars. This will fit as a replacement on other brand 22 mm lug widths with conventional spring bars. Includes 2 hex head wrenches for removing and re-installing the lug bars. One size fits all.