Dolder 67mm HD Multicoated / Multi-Coated 3 inkusive in 1 Filter sets UV, Zircular POL, ND-8 with filter bag made of nylon (Electronics)
I bought the set, especially because of the pole filter. Unfortunately I have no comparison to other (more expensive) products, but seem to me the filter processes as well and the Pol filter provides useful results if you experiment around a bit.