The original Treeze vibe with a bit of a twist added in. The wave vibrator features smooth rolling ridges all along its shaft for added stimulation. Each of these wooden vibrators is still manufacured with the Treeze patented wood and urethane hybrid material that is not only free of dangerous phthalates, but also non-porous, waterproof, and lubricant friendly. Each wave vibrator is also proudly made in the U.SA. Because the fibers of the wood are saturated with urethane resin and are cured under pressure and at high temperature, you can rest assured that there will be no splintering. The 1 1/2" average diameter wand features an ultra smooth shaft and an approximate 8" insertable length. Two AA batteries are required for operation. Since these wooden toys are in fact lubricant friendly, each Treeze Wood Pleasure Wands also includes a sample pack of WET® Platinum Lubricant and a tan padded pouch for safe storage.