"COVER ASSY SHALL BE MADE IN SUCH A WAY AS TO PROVIDE EASE OF INSTALLATION AND REMOVAL,PLUS PROVIDE A SNUG SECURE AND DUST DETERRANT FIT; USE NYLON THREAD PER V-T-295,TY2,CL A; DUCK CLOTH PER CCC-C-428,TY1,CL 1; STREAMER,FIRE RESISTANT,RED CANVAS,PER CCC-C-419,TY1,FINISH PER CCC-D-950"