Pack Of 12 Kilner Wide Mouth Preserve Sealing Discs 9.5cm SECURE SEAL Keep your homemade preserves fresh and securely sealed with Kilner Wide Mouth Sealing Discs 9.5 cm. Specially designed to fit Kilner wide mouth jars with 0.2 L, 0.35 L and 0.5 L capacities, these replacement sealing discs are ideal for anyone who enjoys home preserving. DURABLE DESIGN - Crafted from durable tin-plated steel, each sealing disc features a specially designed sealing compound around the edge that forms a secure vacuum seal during the preserving process. This helps lock in flavour, maintain freshness, and protect your preserves during storage. SINGLE USE DESIGN - These discs are intended for single use only when preserving, ensuring food safety and reliable sealing every time. They are easy to apply, simply place the disc on the jar after filling, secure with a screw band, and process according to your preserving method. Once the jar cools, the vacuum seal forms, indicating your contents are safely preserved. To maintain the quality of the discs before use, they should be hand washed only if cleaning is required and thoroughly dried before use. They are not suitable for dishwasher cleaning.