PARKER LABS AQUASONIC-100 ULTRASOUND GEL SINGLE USE PACKETTES 01-20. Single use 20gm size administers a precise amount reducing waste of product and labor. Eliminates the risk of cross contamination. Acoustically correct for the broad range of frequencies used. Non-sterile. Completely aqueous and will not stain clothing or damage transducers. 100/BX. Priced per box.