ALL ok. Use to Honda Pantheon water pump.
Over the past four years, I've bought about fifty products on AliExpress, but this is the first time I've had real sales support. The sales engeneer helped me to find a ceramic seal (called mechanical) adapted to the water pump of a Yamaha Majesty 250. To do this, he spent several hours measuring the various diameters of the joints in his possession, photographing his measurements with the calipers and sending them to me with comments... I can not believe that it is still possible in a "society" consumption and, especially, on AliExpress... This seller is more expensive than the others, but his dedication and the quality of the product he provided to me (the ceramic seal with a coefficient of friction much lower than that mounted on a whole purchased water pump) amply justify it.