"NYLON REINFORCED PHENOLIC RESIN SHEET; 2.710 IN. LG,1.650 IN. O/A W,0.14 IN. THK EXCEPT 0.250 IN. THK LIP ONE END ALONG EDGE; 1.000 IN. W PROJECTION OPPOSITE LIP; USED WITH SEAL,P/N 39-28137-3 TO SEAL ENGINE CONTROL CABLE PASSAGES IN CLOSURE RIB,INBOARD STRUT NUMBER 3"