407 O-Ring, EPDM, 70A Durometer, 2-1/4" ID, 2-3/4" OD, 1/4" Width, Black (Pack of 10): Amazon.com: Industrial & Scientific
12mm x 17mm x 2.5mm O-Ring (8 pieces): Amazon.com: Industrial & Scientific
MroMax 4Pcs 201 Stainless Steel O Ring 2.36" OD x 0.12" Thickness Strapping Seamless Welded Round Rings 60mm x 3mm for Hanging Basket Chairs, Plants, Tents and Ship Supplies: Amazon.com: Industrial &
Mounting Base O-Ring (2 Pieces): Amazon.com: Industrial & Scientific
Amazon.com: MroMax 10Pcs 201 Stainless Steel O Ring 2.36" OD x 0.2" Thickness Strapping Seamless Welded Round Rings 60mm x 5mm for Hanging Basket Chairs, Plants, Tents and Ship Supplies : Industrial