Made of safe silicone, it is non-toxic, odorless and flexible. It designed for Moka coffee pots. The item is soft, flexible, safe, without crack or leak. Item Name: SiliconeRing Material: Food Grade Silicone Features: Coffee Accessories, Silicone, Replacement 1 Size: 5.1cm x 3.9cm/2.01" x 1.54" (Approx.) 2 Size: 6cm x 4.2cm/2.36" x 1.65" (Approx.) 3 Size: 6.4cm x 5cm/2.52" x 1.97" (Approx.) 6 Size: 7cm x 5.4cm/2.76" x 2.13" (Approx.) 9 Size: 7.9cm x 6.3cm/3.11" x 2.48" (Approx.) 12 Size: 8.5cm x 7.3cm/3.35" x 2.87" (Approx.) Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 2 x SiliconeRings