This new improved heavy duty seal kit is easier to install and lasts longer than your old leaking Dometic part # 385311462 or 385310677 (2 black rubber seals ). The Teflon seal ring is designed with a groove and this groove allows the black seal to sit and align perfectly to ensure a leak free installation. 100% Satisfaction Guaranteed. This seal kit replaces the leaking Dometic seal kit part # 385311462 and fits models: 110,111,210,510,510H, 511, 711-M28,711-98C,712-TM09,848,910,911,2011 DOES NOT REPLACE SEAL ON: 300, 310, 320 series Dometic toilets