O-RING; INTERIOR DIAMETER: 17.17 MM; OUTER DIAMETER: 20.73 MM; THICKNESS: 1.78MM; MATERIAL: BUNA ”N” NITRILE; SHORE HARDNESS: 70 "A" ; CIRCULAR SECTION TORICS; ACCORDING TO ASTM D2000-70B STANDARD; CLASSIFICATION 3CH915B34E16E36 CHARACTERISTICS AND TESTS: ACCORDING TO STANDARDS IR AM 113082 AND 113087. NOTE: TOLERANCE FOR CORD DIAMETER 1.78 (+/-0.08) APPLICATIONS: STATIC USE FOR VERY HIGH PRESSURE. FOR COMPRESSED AIR. ADMISSIBLE TEMPERATURES IN CONTINUOUS SERVICES: -34ºC TO 121ºC.; BRAND 1: PARKER; N-PART 1: 2-017-NBR-SH70