European Metric O-Ring Kits Essential for all workshops and onsite service engineers Range of sizes – no need to purchase individual o-rings Quick identification and easy storage for multiple o-ring sizes Robust casing suitable for transport Temperature range of Nitrile: -30 to +120°C and FPM: -20 to +200°C Hardness: Nitrile 70° Shore hardness (black) and FPM 80° Shore hardness (black)