Raises the level of comfort and convenience for many RV'ers, especially those with physical challenges. Raises permanent toilets 2 1/2". Fits Aqua-Magic IV & V, Bravura, Style Plus & II, Residence, SeaLand 510 and SeaLand 910. 2.5" tall X 15.5" square.. Additional plumbing hook-up materials may be needed. Please consult with your dealer or service representative to determine your specific needs.