As for the Brushheads: unfortunately we do not have the numbers of bristles used in the CHS200 & CHS300. In the communication about the Hydrosonic Bristles we should generally focus on the arrangement and the Hydrosonic Effect caused by the bristles. On the new Bristles which you will sell as well, the focus should be on the CURACURVE and the DROP SHAPE. For all of them, it is important to point out, that we do not use nylon filaments, but CUREN instead, which has the huge advantage of absorbing less water, which keeps the bristles flexible and light.