O-Ring Buna N Blk 18mm ID 21mm OD PK100

O-Ring Metal Detectable Metal Detectable Not X-Ray Detectable X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 18 mm Nominal Width 1.5 mm Actual Inside Dia 18 mm Actual Width 1.5 mm Dash Number Not Applicable Color Black Durometer 70A Nominal Outside Dia 21 mm Actual Outside Dia 21 mm Temp Range -40 Degrees to 250 Degrees F FDA Approved FDA Approved