USA Industrials - O-Ring: 7-1/4″ ID x 39″ OD, 1-1/2″ Thick, Nitrile - 90716879 - MSC Industrial Supply
King Shocks Cylinder OD EC Smooth Plated 2 O-Ring 11.464 – CI Motorsports
Buna 90 O-rings 39.7 x 3.5mm JIS P40 Minimum 5 pcs - OringsandMore
205 Piece HNBR O-Ring Kit
STONEGO 180Pcs/Box Rubber Grommet Assortment Kit Rubber Hole Grommet O Ring Set 1/4", 5/
Ekena Millwork 47 1/2"OD x 39 1/4"ID x 4 1/8"W x 7/8"P Monique Ceiling Ring (1/4 of complete circle) - Walmart.com
Stack Valve O-ring – CCPumping
Amazon.com: Watch Crown Waterproof Seals, Flexible Black Watch Waterproof Seals Watch Head Waterproof Ring Watch Crown O Ring for Home : Clothing, Shoes & Jewelry