"FABRIC; VULCANIZED,LAP JOINTS AND DOUBLERS; 9 HOLES,0.3125 IN. DIA,CTR 1.500 IN. FM EDGE ALONG W; 10 HOLES,0.250 IN. DIA,EA END,EQUALLY SPACED,LETTER U SHAPE PATTERN; REINFORCING PANELS BONDED TO RIGHT SIDE; 16 HOLES,0.250 IN. DIA,CTR ALONG CROWN DOUBLER LG"