This Front and Rear Metal Stack Cap Set from ICE consists of a set front and rear aluminum caps to fit 105mm filters. The cap set allows the filters to be organized while protecting both surfaces from dust, scratches, and fingerprints when not in use. Additionally, the set can be used for a single filter or multiple filters.
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Frankly I was disappointed. The threads on the stack caps have a rough spot that is hard to get past. It is probably just the anodizing and with use would probably get smoother. The real problem and why I won't be able to use them is that my B&W polarizing filter doesn't seem to have a front end thread so there is no way to attach the cap to the filter. The build quality seems to be high outside of the minor thread binding. They are made from aluminum and seem to be quite rugged. They would do a good job of protecting the filter if there was a way to attach them (Not Ice's fault). I took one star for the thread binding.