3" or 4" wax-free toilet flange on 3" or 4" drain pipe. This wax-free toilet seal has a strong, flexible adhesive that creates a positive seal to the bottom of the toilet. Size dimension accommodates floors above the toilet flange by up to3/4". No more guessing if there is a seal with the bottom of the toilet like with wax rings. Made of flexible PVC. Toilet can be removed and reinstalled with the same wax-free seal still attached.