Electroconductive gel media used to facilitate the ultrasonic pulsed echo imaging systemAcoustically correct for a broad range of frequencies usedAqueous, will notstain clothing or damage transducersCan be used with any equipment thatrequires a aqueous, conductive gel (for external use only)Fragrance freeHypoallergenic, bacteriostatic, non-irritatingNon-greasyEasy refill.