124mm Diameter - Standard size compatible with multiple electric flasks. Durable material: Made of rubber or technical rubber resistant to limescale and corrosion. High temperature resistance: Ideal for environments of continuous use and high thermal demand. 30Lt Bucket Lid Gasket for Fixed System by Melasty Part No. 3257 Junta Estanqueidad Resistencia Cal Gasket O Ring For Thermos At Chris Stevens Blog High Temp Gasket Replacement