170 Series Extreme Case, Included: Automatic Purge Valve, Construction: Neoprene O-Ring, ABS Latches, Rugged Pelican Hard Case, For use with Air Quality: 922, Insulation Testers: 1503, 1507, 1577, 1587, Multimeters: 77 III, 77 IV, 114, 115, 116, 117, 177, 179, Process Tools: 712, 714, 715, 717, 718,