I have new old stock (NOS) bags of Rubber O-Rings - 100pcs per bag.

Dimensions are:

3/4" OD

1/2" ID

1/8" (0.130") Cross Section/Thick

Again, these are new old stock, never used and in excellent condition.  I have 100 bags of these - 100pcs per bag.  Each big is for 100pcs.  Bid on or make offer on any number of them.