Aneros Helix Syn Trident Prostate Massager key features are:

• Hands free pleasure with the utmost comfort 
• Specially balanced for superior internal movement 
• Redesigned arms for enhanced external stimulation
• Stimulates 4 erogenous zones simultaneously
• Perfect for beginner and advanced users
• 1.8cm / 0.98" Tip width (A)
• 2.18cm / 0.86" Middle width (B)\
• 4.4cm / 1.75" Arm length (C)
• 8.9cm / 3.5" Insertable length (D)