"YOKE MUST INTERFACE W/ AT1 & AT2; 2 WELDED ARMS W/ RUBBERIZED HANDLE; ADJUSTABLE TRANSDUCER HOLDERS AT ARM END TO ALLOW VARIABLE SPACING OF 3 TO 12 INCHES BETWEEN TRANSDUCER FACES; TELESCOPING ARMS THAT ALLOW TRANSDUCER LOCATION ALONG YOKE ARMS TO BE ADJUSTABLE FROM 13 TO 24 INCHES FROM END OF YOKE; W/ REMOVABLE SOUND SHIELD; SECONG HANDLE FOR STABILITY SHALL BE LOCATED BEHIND SOUND SHIELD; SOUND SHIELD LOCATION SHALL BE ADJUSTABLE ALONG TELESCOPING SECTION OF YOKE ARMS; TO ALSO INCLUDE SWIVEL GIMBLE, COLLIMATOR, 2 INTERCHANGEABLE COLLIMATORS, CABLE CLIPS TO SECURE TRANSDUCER; WEIGHT 6 POUNDS MAXIMUM"