31310 - Footwear cut stock
3131016 - - Outer soles & Innersoles of Leather
3131031 - - Leather cut stock (General) + Heels, Counters, Box toes, Taps, etc.
3131061 - - Boot & Shoe cut stock & Findings (Wood heel blocks, Finished wood heels, Shanks, Welting, etc.
3131XX0 - - Footwear cut stock (Miscellaneous - Volume)
3131XX2 - - Footwear cut stock (Miscellaneous - Speciality)