"GAGE FRONT TURBINE;INCL. DIAL IND.,A PARALLEL TYPE BAR,POSITIONING POSTS, & ADJ./LOCKING DETAIL HAVING SLIDING CONTACT LEG;DIAL IND. SIZED & TINTED FOR ENHANCED VISIB.;PAR. BAR CONST. FROM ALUM.,SPANS MEAS. AREA & HAS 2 SPHER. ENDED LEGS AT OUTWARD ENDS;GAGE KEPT IN FOAM PADDED BOX;GAGE REQ. CALIB. EVERY 12 MONTHS;MEAS. READING MUST BE 26.700 +/- 0.002 FOR ACCEPT.;28.0 IN. L;2.0 IN. W;3.0 IN. H;10.0 LBS;SERD 7821, F33657-94-C-0031"