O-RING; INTERIOR DIAMETER: 20.35 MM; OUTER DIAMETER: 23.91 MM; THICKNESS: 1.78MM; MATERIAL: NITRILE BUTADIENE-NBR; SHORE HARDNESS: S HORE 70 "A" ±5; DIMENSIONAL STANDARD SAE AS 568/ISO 3601-1; IDENTIFICATION ACCORDING TO ASTM D2000/SAE J200 STANDARD; BLACK COLOR; TEMPERATURE RANGE FROM -55 TO 100°C; TOLERANCE ACCORDING TO DIN 3771/ISO 3601; BRAND 1: PARKER; N-PART 1: 2-019