Fly you fools!
From the website:
Set contains 5 Bat Wing-packs (3 different poses). Items have 3x1mm magnet type holes allows to easly mount and dismount Wing-pack on back of a Combat armour. Model is designed to fit 28mm "heroic" tabletop wargames scale (54mm maximum wingspan), supplied unassembled and unpainted. Designed by AR sculpted by Maciej Powarunas.