Wave Profesional Nitrile Rubber O-Ring Metric Sealing Gasket 20 Pieces 4 mm Outer Diameter 2 mm Inner Diameter 1 mm Width NR Original product from Wave Profesional (Future Wave Product & Trade). Durable nitrile rubber O-rings. (1) Nitrile Material: Standard nitrile butadiene rubber. Usable in a wide temperature range from -4℉ (-20°C) to 212℉ (100°C). Also, the hardness is 70A durometer (Shore hardness), resistant to penetration. (2) Features: This series of nitrile rubber O-rings have a round cross-section and are used for sealing between cylindrical overlapping surfaces. They are versatile, high-performance parts used in various cylinders such as engines, flanges, and valves. (3) Applications: Widely used in gas compressors, heat exchangers, boilers, filters, blenders, coffee makers, piping, doors and windows, household electrical appliances, electronic musical instruments, and more. ˗ˏˋ See the product list here ˎˊ˗ ☘️ Instant purchase OK! ☘️ Opened for product confirmation, so listed as "Like New". ☘️ Shipped using the most affordable method. If you prefer anonymous shipping, please let me know in the comments before purchasing. (՞ .ˬ.՞)" 47-36 60030