The Aneros Helix Syn is a prostate massager, or male G-Spot stimulator. It has a slightly modified shape from the original Helix for a more comfortable fit. The Syn also has a solid inner frame for rigidity, a coating of Velvet Touch silicone, and a Perineum Comfort Tab. The tip is 1.0625 in. wide, and the mid-range width is 0.9375 in. Insertable length is 4 in. A discrete bonus storage box is included.