Parker Labs, Ultrasound Gel Scan Transmission 3.8 Liter (1 Gallon) Bottle, Count of 4Product Description Acoustically correct, provides superior transmission of ultrasound waves Completely aqueous, will not stain clothing, damage equipment or irritate skin Acoustically correct for the broad range of frequencies used Hypoallergenic, bacteriostatic No formaldehyde Exclusive dual viscosity formula allows SCAN to be applied as a gel and scan as a fluid For medical ultrasound procedures when a less viscous gel is desired Includes 8 oz.