Rubber O Rings: Types, Rubbers, Benefits, and Design
What is Viton? A Guide To Viton O Rings - NES
O-ring For Mechanical Seals Use (material: Vit/nbr/epdm) 40/45/50/55mm 15.8*3.1mm O-rings |spare Parts For Mechanical Seals - Oil Seals & Other Seals - AliExpress