Maybe for craft? Make a rubber armor?
32,000 o-rings bought in 2021ish. All similar size
4000x of black oring 5.05mm OD x 1.78 th
8000x of black oring 5.28mm OD x 1.78 th
1400x of black oring 5.50mm OD x 1.50 th
5000x of black oring 6.00mm OD x 1.50 th
9000x of black oring 6.07mm OD x 1.78 th
5000x of black oring (no label)