1. They are circular in shape, round in cross-section. For use across a wide temperature range from -40℉ (-40°C) to 248℉ (120°C).
2. Nitrile Rubber or Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Good resistance to many petroleum oils, greases, hydraulic fluids, mineral oil and grease.
3. This O-ring is made of black nitrile rubber, has a durometer of 70A, and is designed for use in a wide variety of sealing applications.
4. O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in flanges, valves, and various cylinders.
5. Nitrile Rubber is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to light.

Package Content(Quantity*Inner Diameter*Cross-Section Diameter):
100pcs*1mmx2mm， 100pcs*2.5mmx1mm
100pcs*3mmx1mm， 100pcs*4mmx1mm
80pcs*4.5mmx1mm，80pcs*5mmx2mm
80pcs*6mmx2mm，80pcs*7mmx2mm
60pcs*8mmx2mm，40pcs*9mmx2mm
30pcs*10mmx2mm，12pcs*12mmx3mm
12pcs*13mmx3mm，12pcs*14mmx2.5mm
12pcs*16mmx2mm，12pcs*18mmx2mm
10pcs*17mmx2.5mm，10pcs*20mmx2mm
10pcs*22mmx2mm，10pcs*25mmx2.4mm