Culina 8" Silicone Gasket, Hermetic Ring Seal. Replacement Part for 6 Qt. Pressure Cooker 8" Airtight silicone ring fits inside Culina lid to hermetically seal the pot for safe cooking under pressure. Ring should remain supple & flexible Also acts as backup emergency release if pot is overfilled. When safety valve clogs up and fails to engage, pressure escapes, and tears the seal. Replacement Part designed for Culina 6 Qt. Pressure Cooker ONLY. Insert inside the lids inner edge. Product NOT designed to fit in any other brand. Care and attention: avoid formation of mold, rancid odors, or damages by ensuring gasket is washed, dried, and pulled out of lid before storage. 100% Culina Satisfaction Guarantee