The Aneros MGX Syn Trident Prostate Massager key features are:

• Ribbed stem for more defined stimulation
• Redesigned arms for enhanced external stimulation
• Moderately focused stimulation with the utmost comfort
• Specially balanced for greater responsiveness
• Made from luxurious silicone 
• 2cm / 0.8" Tip width (A)
• 2.5cm / 0.98" Middle width (B)
• 4cm / 1.6" Arm length (C)
• 9.4cm / 3.7" Insertable length (D)