Erection Assistant Hollow Strap On 6 inches Vibrating Black from Nasstoys of New York. Features: 7 vibration functions. On/Off function button. Phthalates free, RoHS compliant materials PVC Dildo and Nylon Harness. Size: 6 inches in length by 1.75 inches in width. Rechargeable vibrations. USB cord included. Charging time: 130 minutes. Nasstoys – Erection Assistant Black. Categories: Rechargeable Vibrators, Hands Free Strap-On Vibes, PPAS or Prosthetic Penis Attachments, Body Harnesses.