Conically tapered ball eases insertion Finger hollow 'easy-in” provides an insertion aid Steady and intense rolling motion of inner balls Almost completely silent Flexible silicone retrieval band, barely noticeable Velvety soft silicone sheathing Gentle to the body, hypoallergenic Smooth surface for easy cleaning Size: 17 cm ∅ balls 3.2 cm and 3.6 cm Made in Germany 2 year warranty