The new O2 Max is very similar to the recent O2 Luke, with one important difference: Max offers an extra inch of insertable length. The extra length makes Max perfect for use in a harness. Tantus� Dual Density O2 line delivers maximum satisfaction through a Super Soft� outside and a hard muscle core, both made of Tantus� own unique blend of 100% Ultra-Premium Silicone. Max is available in Cream, Cocoa, and Black, and with proper care can last a lifetime. Diameter: 2" Length: 6.5"