Gastec Butyl Mercaptan Gas Detector Tubes. Options:

tert-Butyl Mercaptan Detector Tubes
Detection Range: 0.5-30 mg/m3
(10 tubes, 10 tests per box)
P/N 75L

tert-Butyl Mercaptan Detector Tubes
Detection Range: 2.5-150 mg/m3
(10 tubes, 10 tests per box)
P/N 75