DYNAREX 1243 ULTRASOUND TRANSMISSION GELL. Conductive gel media used to facilitate the ultrasonic pulsed echo imaging system. Acoustically correct for a broad range of frequencies. Aqueous, will not stain clothing or damage transducers. Fragrance free. Bacteriostatic and non-irritating. Non-greasy. 5-Liter container. Blue. 1/EA, 4/CS. Price per Each.