Agilent Certified Pre-Owned GC/MS instruments are factory refurbished to like-new specifications to provide optimal performance for your laboratory. Unlike unknown sellers, Agilent Certified Pre-Owned products come with one year of warranty, expert installation and introduction. Agilent offers a wide portfolio of refurbished GC/MS instruments, whether you need the reliability of the industry leading single quadrupole GC/MS or the sensitivity and accuracy of the GC/QQQ and GC/Q-TOF.