Brand Name: TIANTIAN Model Number: o-ring Function: Seal for Automotive, Machine, Valve, Electrical Appliances, etc. Hardness: 20~90 Shore AColor: Black (recommended), but other color available Properties 1 (Multiple Choice): Oil Resistance, Chemical Resistance, Steam ResistanceSize: DN max = 2000mm, all other smaller sizes will per customer demands Properties 2 (Multiple Choice): Aging Resistance, Heat Resistance, Cold Resistance