Smooth threaded tapered shape Rounded tip for easy insertion Comfortable plug stays in place Flared base for easy retrieval Easily warmed or cooled Embedded rainbow jewel base Storage bag included Nickel free aluminum alloy Body safe & phthalate free Available in 3 sizes 3.7in. (94mm) Length / 3in. (76mm) Insertable / 1.53in. (39mm) Width