... the Shandong Quality supervision and inspection institute. ItemEPE Foam Hollow Sealing Gasket for Costemic PumpMain MaterialPEColorWhiteShapeThe inner diameter ... 2.5mmFunctionCorrosion Resistant, Non-toxic, Tasteless, Odorless, Acid-proof, Alkali-proof, Water-proof, Anti-leakage, Anti-deteriorant, Anti-moldy ,Extend the ... in this Line More than 20 years EPE Foam Hollow Sealing Gasket for Cosmetics Pump