Features: You can replace our silicone lid Gaskets to reform a good sealing effect on the cup and keep clean, while preventing leakage. Make of food grade silicone materials that is safe to use, easy to clean, leakproof, heat insulated. You only need to roll off the old cup Gaskets and put the new on. Simple installation can keep the cup clean as usual. It recommended that you replace the silicone lid seals every three months, which not only maintains the sealing performances, but also prevents the residues of dirt and make your cup likes new. Sufficient quantity: you will receive 10Pcs replacement lid seals, enough quantity for daily needs and replacements. Specifications: Materials: Silicone Color: White/Black Inner diameter: about 3.50cm/1.38inch Package Includes: 10Pcs Lid Rubber Gaskets note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.