NEXT BY DANCO Perfect Seal Toilet Wax Ring, Black and Blue, 1-Pack (10718) PERFECT SEAL: Guarantees a perfect seal on the first toilet installation NO MESS: Hidden wax ring delivers a no-mess installation with 3x's stronger seal than wax rings. Toilet can be repositioned as needed. MAINTAINS INTEGRITY: Maintains a tight seal when common toilet and floor movements occur FIT: Accomodates toilet flange heights from 1/2 inch above the floor to 1-1/2 inches below the floor. Inner Dimension of adapter is 2-5/8 inch; Inner Dimension of Center of Seal is 2-3/8 inch. INSTALLATION TIP: If toilet does not sit flush to floor, the black plastic ring inside the gray rubber casing can be removed allowing the Perfect Seal to be fully compressed. Creates the perfect seal for any flange height Seals if there is movement in the toilet or floor Can be respositioned Rubber gasket encasing for a no-mess installation