Dual Vibes
Newer entries to the dual vibe category have non-mechanical silicone shafts that vibrate but don't rotate. You'll have to use your wrist to achieve vaginal stroking but silicone is a winner every time for easy cleaning and long life. The duality in their design comes from the fact that you can achieve vaginal penetration at the same time as external clitoral and labia vibration, all together from the same toy at the same time.
If manual dexterity isn't your strong point, there are some silicone mechanical rotating dual vibes to select from (look up at Mermaid or Dino Deux!). As with the previously discussed rotating duals, the shafts rotate via mechanical operation while the clit portion flicks away under separate controls. This creates a high tech wonder but more parts to break down in the long run. Remember: the fewer mechanics, the longer lasting which is why we ask you to consider these stationary duals in lieu of the mechanical rotating wonders.
The dimensions given below are usable penetrative length and diameter at the widest point.