Flow’s patented SMART (Safely Manage Align Recover and Transfer) positioning system makes using phosphor plates just as easy, familiar and convenient as film. It combines the protection of a barrier envelope with a parallel positioner and aiming ring. Simply load a phosphor plate into the disposable SMART cassette. The cassette protects the plate and clips onto the universal bite block. When this is attached to the aiming ring and positioning bar, it guarantees perfect positioning. Warning: Do not autoclave. Kit contains: 4 Aiming Rings (2 Anterior, 2 Posterior), 4 Indicator Arms (1 Anterior, 2 Posterior, 1 Bitewing), 8 Bite Blocks (Universal), 70 Cassettes (20 Anterior, 50 Posterior)