From their announcement:
I’ve just released the first wave of some new products for the shop.
First are the black resin pre-slotta cup bases. Now its easy to base your metal based miniatures the same as your slotta ones. Just select the internal diameter that meets your requirements, stick the choosen miniature in, and create away.
Three different sizes and two depth options. Also useful for the miniatures with metal bases so small they just won’t stand up on their own.
Second is the first in a new line of hard plaster scenery items. 7 crates sculpted by John Picford and unique to Miniature-Heroes.