Detector Tube, Measurement Range 10 to 500 ppm, Gas Detected Ethyl Benzene, For Use With Mfr. No. NX-1000-100, Mfr. No. NX-1000-130, Mfr. No. NX-1000-150, Mfr. No. NX-1000-200, Mfr. No. NX-1000-230, Mfr. No. NX-1000-250, Tube Material Glass, Break-Off Tip Yes, Calibrated Yes, Product Type Gas Detection Tube, Sampling Method With Pump, Shelf Life 1.5 yr, Chemical Formula C8H10, CAS Number 100-41-4, Package Quantity 10