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defender rear hub seal
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The materials used for these seals must be carefully selected based on the operating conditions and fluids involved
hyd cylinder seals. Common materials include nitrile rubber for general-purpose applications, polyurethane for higher abrasion resistance, and PTFE (Teflon) for low-friction requirements. The choice of material significantly impacts the seal's performance and lifespan.

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Prof Matthew Wright, both a member of the FAF Panel and chair of EFSA’s working group on E 171, said: “Although the evidence for general toxic effects was not conclusive, on the basis of the new data and strengthened methods we could not rule out a concern for genotoxicity and consequently we could not establish a safe level for daily intake of the food additive.”