34X3.1 Oring 34mm ID X 3.1mm CS VMQ Silicone O ring O ring Sealing Rubber|Seals| - AliExpress
Price history & Review on 200pcs/set 16-34mm Waterproof Rubber O-Ring Watch Back Cover Seal Gaskets Watch Repair Parts | AliExpress Seller - Beloved Watch Store | Alitools.io
Bresser | LUNT O-ring 34mm for Pressure-Tuner at MT & THa solar telescopes | Expand Your Horizon