This is a set of four crater terrain pieces, in the 28mm scale. These are made from recycled, pulped paper, using a technique similar to carton pierre, a nineteenth century technique for making decorative architectural features. The terrain pieces are stronger than the typical styrene terrain pieces, will not shatter like resin, and (if they should break) can be repaired with white glue.
From EBAY:
[url]http://www.ebay.com/itm/131749009808[/url]
From ETSY (with reviews):
[url]https://www.etsy.com/listing/118673571/war-game-28mm-paper-crater-terrain[/url]