Simply stylized bits for 28mm miniatures (but fits to other scales after re-sizeing).
It fits to Warhammer 40k and other wargames.
Why do we prefer stylized minis? Hyperrealistic models looks really cool on miniatures (especially with some editing) but often you need high resolution printer to accoplish all that awesome details. Otherwise it's hard to paint such detailed minis - you need tons of experience and time to do it properly. That's why you probably should choose stylized models.