Exceptionally smooth, non-porous surface. 3D printingOpen cage chastity designs are made of a strong, lightweight plastic to keep the device rigid and unbreakablePackage 100% discreet.Include 4 base ring+1cage+1pair keyCage Length: Tight-60mm (2.36 inches tube) (total length 70mm）Ring Size：42mm, 45mm, 48mm and 52mm rings included.