Ultrasonic Couplant Gel 5L, Product Type Ultrasonic Couplant Gel, Compatible with Manufacturer Model Number R7900, TM-8811, Compatible Product Type Ultrasonic Thickness Gauge, Features Water Soluble, Includes Applicator Bottle, Steel Thickness - Maximum 0 in, Steel Thickness - Minimum 0, Overall Diameter 8 in, Calibration Certificate Type Not Certified, Overall Height Not Applicable, Overall Length Not Applicable, Overall Width Not Applicable, Manufacturer Warranty Length 1 yr