Gravity Steel Ball Anal Plug Tighten Trainer

feature: 

• 100% brand new and high quality.
• Great product for male/female masturbation or couples sex.
• Can be used as anal plug or vaginal massager.
• Built-in gravity steel ball can also be used as anal tightening exerciser.
• S/M/L sizes for progressive training.
• Safe silicone and ABS material, skin-friendly.
• Daily waterproof and easy to clean.

Specification:

• Color: dark green
• Material: silicone + steel
• Size: S,M,L
• Diameter: about 29.7/33.5/37.5mm
  
• Weight: about 113/136/234g
• Waterproof: Yes

Anal training operations:

• Contract the anus for 5 seconds (2-3 seconds for beginners),
• Relax the anus for 10 seconds,
• Repeat 8-10 times in one set, 2-4 sets per day.
• 1 anal plug