OD 19mm O-Ring ID 15.2mm CS 1.9mm For Brushless Motors Propeller Valve Black Sealing Washer NBR Rubber O Ring Flexible RC Parts - AliExpress Toys & Hobbies
19mm Stainless Steel O-rings 20 Pack Bird Toy Parts DIY - Etsy
RS PRO | RS PRO FKM O-Ring, 19mm Bore, 23mm Outer Diameter | 196-5714 | RS Components