Body - Fiberglas impregnated with silicone or chloroprene (See noie 3). Spring s W helix and fiberglass cordage.
Ends - Soft - Same as Body without wire or cordage.
Plain - Same as body wim wire and cordage.
AIA/NAS NAS 1192-1990 history
1990AIA/NAS NAS 1192-1990 Performance Specification for Hard Anodic Coatings on Aluminum Alloys (Rev. 2)