I have two bags of o-rings (see photo) that I don't need. 80 count of 5 mm ID x 2 mm CS Buna-N Duro 90. 20 count 3/16" ID x 3/8" OD x 3/32" CS Buna-N Duro 90. You can use these possibly in your airgun breech or other areas of your airgun, air pumps, etc. Would like to trade for 5.28 mm ID x 1.78...