2. 80% of the sealing rubber rings are made of fluorocarbon rubber (FKM) which comes from USA and Taiwan, and 20% is ACM rubber, of which all ACM raw rubber is imported from Japan. Original from USA, excellent airtightness, good compressibility, good creep resistance, chemical corrosion resistance, stable elasticity, non-stick effect, non-corrosive, strong temperature resistance. These costs are not included in the item price or shipping costs and must be borne by the buyer. Please check with your local customs authority about possible additional costs before purchasing. For deliveries to countries outside the European Union (third countries), additional customs duties, taxes, or other fees may apply. These charges are not included in the item price or shipping costs and must be paid by.