O-Ring 1/4x7/16x3/32 #78 - Faucet O Rings - Amazon.com
China 1 1.5 1.78 1.8 2.0 mm silicone rubber O rings NR CR NBR EPDM NBR NBR rings silicone seal rings for gun sights and accessories factory and manufacturers | Anconn
Carpigiani IC193205240 O-Ring 1,78 2,9 Nb 70 2012
Metric O Rings | Engineers Mate
O-ring (ID x cross,mm) 5,28 x 1,78 DIN 3770, EU origin, variable pack, material | eBay