Aquasonic 100 Non Sterile 5 Liter (175 Oz) Electronic Stethoscopes 6 x 25 Yards * or Parkinson s 6 x 25 Yards * Ideal for under a cast * Soft knitted cotton * Features a dispensing box * 5cm x Diameter: 14 ORIGINAL BLUE * 5 Liter(175oz) Each * World Standard for Medical Ultrasound Transmission AQUASONIC 100 is the most widely used gel for diagnostic and therapeutic medical ultrasound * Recommended for all procedures where a viscous gel is required * Acoustically correct for the broad range of frequencies used * Completely aqueous will not stain clothing or damage transducers * Unique can't be copied formula is hypoallergenic bacteriostatic non sensitizing and non irritating * No formaldehyde * Not a spermicide * Used and recommended by leading manufacturers of medical ultrasound equipment worldwide *