Honeywell calibration Kit, includes tubing, flow adaptor, 0.5 LPM regulator, 2-cylinder carrying case for XCD Toxic/Oxygen Kit* (contains 998-100-004 tubing, S3KCAL flow adaptor -calibration cup-, N600-1001-33 flow regulator, 998-100-015, 998-100-003 carrying case), 3/16" ID Tubing, gas cover, C-10 inlet regulator. Note: XCDTOXKIT should be used with XCD-Flammable (Catalytic Bead) IR, (Does not include calibration gas)