From publisher blurb:
Will they barter or will they swarm you? Either way, always watch your back when dealing with the Piffer!
Inhabiting vast, ant-hill like tunnel networks in either the ruins, mutated forests, badlands and tangled swamps, the two-foot tall race of piffers are unpredictable little omnivores. Sometimes they'll trade remarkable, oversized relics to passing dig teams in return for honey, baked goods, jam or booze, and at other times, be hostile and predatory.
This new race of scale-covered, grayish colored mutant humanoids are like the gnomes or kobolds of a post-apocalyptic world and can add either a bit of humor to a game or add horror, depending on the nature of the particular tribe.
This 7 page PDF includes weapon tables, random mutations, the loot contents of their pouches, guard beasts as well as stats for the half-human specimens called Piffohumes.