ASTM A407-07(2013)

1.1.1 Type A—Coiled (Marshall pack),

1.1.2 Type B—Coiled and knotted,

1.1.3 Type C—Coiled and knotted (offset style),

1.1.4 Type D—Coiled and hooked (single and cross helicals),

1.1.5 Type E—Coiled and hooked (short tension—regular tensile strength),

1.1.6 Type F—Coiled and hooked (short tension—high tensile strength),

1.1.7 Type G—Regular lacing,

1.1.8 Type H—Automatic lacing,

1.1.9 Type I—Zig-zag (U-formed),

1.1.10 Type J—Square-formed, and

1.1.11 Type K—Sinuous for furniture spring units.