Yes, see the photos below. On eBay do a search for "Oster silicone" and you'll see 1-packs, 3-packs, and 5-packs. They're very inexpensive. Initially, I bought a couple of 3-packs, but recently decided I needed a couple of 5-packs because I have been an Oster user for years and have all sorts of accessories with the old dried-up factory seals. These silicone seals could last a lifetime.
[Edited to add the 5-pk photo]
[ Edited by: AceExplorer 2020-01-26 09:59 ]