PREMIUM FOOD-GRADE SILICONE Our BPA-Free sealing gaskets are made of 100% food-grade silicone. Distinguished from cheap low-quality gaskets, our silicone rings don't contain plastic, phthalates, lead, cadmium, mercury, PBB or other harmful carcinogens. AIRTIGHT AND LEAK-PROOF Our sealing rings match the models airtight, such as 5 Quart and 6 Quart Seal Tops (IP-DUO60, IP-LUX60, IP-DUO50, IP-LUX50, Smart-60, IP-CSG60, IP-CSG50). If these sealing rings not fit your pressure cooker, we will offer you a full refund. 3 COLORS SEPERATE FLAVORSBlue is for savory foods such as chicken tikka masala, curry. Red is for sweet foods such as orange chicken, sweet cakes or lemongrass. White is for common use. If you have other color or taste needs, please contact us. HIGH TEMPERATURE RESISTANCEBesides food safety, high temperature resistance is also a necessary guarantee. Our silicone rings can tolerate temperature from -40 to 500 degrees. It is easy to clean in dishwasher, or directly sterilized in boiling water. Also, it's easy to store and drain in dish drying rack. 30 DAYS MONEY BACK GUARANTEE If you are not satisfied with our products, please contact us, we will reply you within 24 hours. If you receive damaged product or silicone rings don't fits your pressure cooker, we will offer you full refund or replacement as soon as possible