I would like to add a few things that I have not found in other reviews as I know:
1. With 4 additional buffers are a total of two buffers in 5 mm, 7 mm and four buffer in two buffers in 9 mm. As usual four buffers are placed under the seat.
2. The "white" is not really bright white, but has for me rather a slight gray tinge. I like even better!
3. Amazon claims with me, "Customers who bought this product also bought ... toilet Sisto 8 mm in diameter", but no one reported it. The manufacturer of toilet seat Befester (I can not think of a better word) even claims full, Sisto "protects you from unpleasant injuries sustained". You know that too? Once again slipped off the toilet and hurt your tailbone? No? Neither do I. My skepticism was rewarded - the WISA Mars S sits well with me so bombproof.
If you decide not discover the information for the first time - two is better;)