With the brand Sanifri I can not do anything but the toilet seat was manufactured by the company. Hamberger their products under the name HARO me are known and are kept in stock and the plumbing wholesalers.
When unpacking the package I had to laugh heartily because I am fitter and have installed exactly this seat until 8 weeks prior to a customer.
The installation is quite simple. On the upper part of the Take Off hinge the round
Seal plugging. With the wide side to the metal pressing until it expands and no longer slips. Then the 8mm bolt stuck through the mounting holes of the toilet. From below first the rubber washer, then push on and push up the washer and finally the nut.
Then line up the toilet seat and tighten the nut, finished.
A black assembly aid for tightening the screws is included.
This is needed especially in a wall toilet.
The toilet seat is ergonomically shaped and fits me like a glove.
The Soft Close function works, through their own experience many years, and spare parts has my wholesaler in stock.
The best part is the removable seat so that can be really cleaned everywhere.
Do not clean with scouring powder, then the surface is dull.
A normal detergent and plenty of water are perfectly adequate.
Full 5 stars and a clear Best Buy.