25mm x 31mm x 3mm O-Ring (5 pieces): Amazon.com: Industrial & Scientific
50 pcs Open O Rings 15mm 25mm 32mm 45mm ring Plastic for Dee webbing Belts Buckle Bag Black|plastic ring spacer|plastic toy ringring garnet - AliExpress
Metric - O Ring 25mm X 32mm X 3.5mm - B3575M - Parts Direct New Zealand
O' RING,25MM for C2SS ROADRUNNER 1967 USA - order at CMSNL
O-RING, ALUMINUM CYCLONE, 25MM, 5/PK | Zefon International