https://mcd-co.com/pei-back-up-rings/
PEI back-up rings | McDowell & Company
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https://www.dmsseals.com/upe-and-pctfe-low-temperature-resistant-lng-system-jointsspring-seals-and-back-up-rings-5774.html
UPE and PCTFE Low Temperature Resistant LNG System JointsSpring Seals and Back Up Rings-DMS Seal...
Overview Quick Details Size: All, standard Size Place of Origin: Guangdong, China Brand Name: DMS SEALS Model Number: LNG Product name: LNG System Joints seals...
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