Twin Pack: 2 sealing rings compatible with Cuisinart Pressure Cooker CPC-SR600 for 6 Quart Cookers including CPC-600 and CPC-900. These rings are not created or sold by Cuisinart. Material - Made from a durable silicone compound that provides flexibility and a reliable seal. Compatibility - Fits models: 3066, 3067, 3093, 3094, 3111, 3112, KF140, KF197, 600 and 900. Replacement guidance - Replace every 18-24 months or when deformation is noticed to maintain seal performance. Key benefits - Maintains a reliable seal to prevent steam leaks during pressure cooking - Durable silicone construction for repeated use - Value twin pack provides spares for convenience and reduced downtime Use scenarios - Routine maintenance: swap in a fresh ring to restore seal and cooking consistency on regular 6 quart CPC-SR600 use - Back-to-back cooking: keep a spare on hand to quick swap between batches without delaying meal prep - Aging or heavy use: replace when signs of wear or deformation appear to preserve pressure performance