Calibration Gas, CGA Number CGA 600, Container Type Cylinder, Cylinder Capacity 17 L, Cylinder Diameter 2.9 in, Cylinder Height 10.75 in, For Use With All OEM Gas Detectors, Gas Mixture Isobutylene 5 ppm, Gas Type Isobutylene, Product Type Calibration Gas, Chemical Formula C4H8, CAS Number 115-11-7, Accuracy +/-5 Percent, Background Gas Air, Calibration Certificate NIST, Cylinder Material Steel, Outlet Connection Size 3/4 in, Outlet Connection Type NGT, Standards ISO 9001:2015