"USED TO SUPPORT X-RAY TUBE HEAD; CONSISTS OF MOUNTING BASE W/ THREE ADJUSTABLE FEET FOR LEVELING AND HEIGHT ADJUSTMENT; SPACER BLOCKS FOR GROSS ADJUSTMENTS IN HEIGHT; CLAMP ASY THAT SAFELY SECURES X-RAY TUBE; REQUIRED TO SUPPORT 30 DAY DEPLOYMENT; SUPPORTS TUBE HEAD CONFORMING TO MIL-PRF-32133; SUPPORTS TUBE HEAD W/O OBSTRUCTING X-RAY BEAM 40 DEGREE CONE; ALLOWS VERTICAL ADJUSTMENT OF THE TUBEHEAD CENTERLINE TO ACHIEVE SOD DISTANCES OF 9.75, 10.0010.25, 12.00, 12.50, 16.25, 16.60, 17.60, AND 17.80 INCHES ABOVE TARGET ON THE WING UPPER SURFACE"