"EI 4931-00-508-5477,155MM HOWITZER MOUNTING SURFACE FOR M25 MOUNT TELESCOPE"
FEAT
SPECIAL FEATURES
"GAGE DIMENSION 8.375 IN. SQUARE; MINIMUM GAGING PROFILE 2.125 IN. DIA,0.406 IN. DEEP;SURFACE FLATS TO BE PARALLEL WITHIN 0.002 FULL INDICATOR READING"