pegasus4dLECO's Pegasus 4D is a comprehensive two dimensional Gas Chromatograph Time-of-Flht mass spectrometer. Comprehensive two dimensional gas chromatography (GCxGC) allowsItem Pegasus® 4D GCxGC-MS (TOF) Company LECO Corporation; Catalog Number Pegasus 4D; This product is no longer available on . is the leading resource