New Designz Thread Saver On/Off ASA

Features:

   * Used in between your bottom line ASA and your tank.
   * Easy to use with a twist to turn outside ring
   * Say goodbye to those hard to thread tanks once they start to air up
   * Use on virtually any marker with a standard fixed ASA
   * Small profile
   * Prevents thread damage due to early tank air up "hard to thread on condition", normal with standard bottom line ASA's
   * Turn outside ring to off, purges the marker lines for easy tank removal