MetriCide 28 is intended for use in a tray system with a variety of noncritical, semi-critical, and critical devices - including anesthesia equipment, respiratory therapy equipment, metallic equipment or instruments, rubber objects, plastic objects, and thermometers. MetriCide 28 may be reused up to 28 days, assuming the minimum effective concentration of glutaraldehyde, as measured by a chemical indicator, remains within acceptable parameters and other conditions of use are met. 1 Gallon. Price per gallon.