DYNAREX ULTRASOUND GEL 5 Liter (1.3gal) DISPENSER. Medical Imaging Assistance. Electroconductive gel media used to facilitate the ultrasonic pulsed echo imaging system. Acoustically correct for a broad range of frequencies used. Completely aqueous, and will not stain clothing or damage transducers. Can be used with any equipment that requires a aqueous, conductive gel (for external use only). Fragrance free and hypoallergenic, bacteriostatic, and non-irritating. Non-greasy and easily refilled. Blue. 1/EA, 4/CS. Priced per each.