I have ordered the sponge only for private use for my home office. My White board with the size of 80 x 100 cm is the size of the sponge (W x H x L): 5.8 x 2 x 11 cm ideal consistent. The cleaning effect, I find amazingly good, because only with the slight wiping over the color going on with little effort. If the font of the effort, however, is liable, however, a few days at the whiteboard larger, which is how I find it completely normal. The imprint DAHLE contrast bothers me a little, because it just comes to me on the quality and is good with this product. The only thing that bothered me is the effect of the magnet, which is designed a bit too weak in my eyes, because moving the wipers on my whiteboard solely by gravity down. That's why, unfortunately, a star deduction.
