Wide Compatibility: This 4 pack flexible toilet seal set fits various tanks styles toilets and common setups with matching flush mechanisms, suitable for models like K 4137, K 4147, and 1207982 to maintain water resistant function. Precise Dimensions & Strong Construction: Each 1203764 flush component seal measures 3.19in outer width, 1.75in inner width, and 0.097in depth, made from flexible silicone for enhanced resistance to wear and weather changes. Efficient Barrier: The soft silicone design forms a tight seal between the toilet reservoir and flushing parts, water escape and unwanted odors near the base over time. Enhanced Longevity: Designed for uniform thickness, these smooth seals resist hardening or cracking, outperforming standard rubber washers with better durability and consistent flushing action. Package includes: 4pcs toilet silicone gasket