Very small (slightly larger than a pack of cigarettes) is because the wiper of Dahle. But that he is very good in the hand, so wiping it effortlessly by hand. On stronger pressure it is even for something. He is magnetic, he is also right on the whiteboard "stick" so that you are quickly ready for use again after wiping off and the wiper is not lost. The wiper motor is fine, a little effort you have to expend already. That may be due to my whiteboard, but the sponge, which I have used before, was slightly power saving. Here not a typical sponge is used, but something that is more reminiscent of felt. However, it's probably more of a man-made fiber. This is the way, only about 1mm thick. below it a slightly thicker gray "soft plastic layer" (similar to foam rubber), followed by an even thicker layer red.
The wiper there are red and blue colors. The red is very bright, so that the wiper - he should not even be mounted on the board - should be good retrievable.
How long will he hold I can not yet foresee. It is well made and all the layers adhere well to each other currently. Only when wiping effort could be optimized by a thicker layer maybe something else.
