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By certification 
Fluorocarbon rubber FKM o-ring has good properties of non-flammability and low gas permeability,has excellent resistance to ozone,weathering and aging.
Technical Data
Operating temperature: -20 / +200 ℃. Special formulas FKM can resistance from -40℃ to +230 ℃
Dimensions:
Standard: AS568, BS1806,ISO3601,JIS B2401,DIN3771,NFT 47-501
Nonstandard FKM o-rings available.
Color:Black,green,brown,etc.
Hardness: 50 shore A, 60 shore A,70 shore A,80 shore A,90 shore A.
Our Advantages:
ISO9001 Certificate -High Quality Control
Subordinated manufacturing factories -Competitive price.
RoHS certificate,REACH certificate,FDA certificate - Meet stringent industry requirements
Research and Development team; -Providing specific sealing solutions for you
Good service:Your inquiry will be answered within 24 hours,if any problems after sales,
http://www.ostasos-seals.com/
