Toilet seat designed to fit Duravit Starck 3, soft close, quick release. 5060320110549 | eBay
Duravit 0128092092 | Studio41 | Starck 3 Toilet Close-coupled E 1.6/0.8 Gpf, Outlet For Vario Connector Set, For Horizontal And Vertical Outlet, Length Adjustable From 2 3/4" - 7 7/8", And Vario