Features: 100% brand new and high quality Premium medical grade silicone, smooth and durable, safe to human body, odorless, no phthalate, non-toxic, no allergic reaction. It works with any water-based lubricants. Soft and flexible material with tapered top, providing comfotable contour with Urethral muscles Hollow tube inside for urethration and ejaculation. Capable for long time wearing. fit different glans size or different parts on penis. The ring can delays ejaculation and prolong your pleasure time. It's also helpful keeping this Urethral Plug stable after insertion, you can even walking around if you want. Color:BLACK Material:Silicone Size: length:30cm width: 0.3cm, 0.4cm, 0.5cm, 0.6cm, 0.7cm, 0.8cm, 0.9cm.1cm Note: Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x pc