Aquasonic 100 Non Sterile 5 Liter (175 Oz) Oxygen Regulators * Adjustable height of 25 Style:Pair (Left & Right) * Adjustable height of 25 5)) * Dual durometer for medial side or spur fascia relief and maximum comfort while standing walking or running *Medium durometer silicone in main body efficiently absorbs impact and recovers quickly *Softer silicone blue zone area provides increased comfort and pain relief *Optional anti microbial cover absorbs odor prevents bacterial growth and allows foot to slide easily into the shoe *Retains shape will not deform or degrade with use *Washable and reusable *1 pair package *Covered Large 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 *