Fluorescent colouring, which is what sets it apart visually from the rest of the tentacle shapes. Dimensionally it is close to the larger Charybdis: 15 mm at the tip, 40 mm through the middle, 60 at the thickest point. Silicone. The choice between the two comes down to appearance rather than to size.
Silicone bodies and silicone lubricants do not belong together — water-based is the answer.
Wash it after use with warm water and a soap that has no perfume in it, then dry it off.
