The entire Crystal collection is made of 100% hand-blown, premium Borosilicate glass. These items are of the highest quality, and represent the most vibrant and durable glass products available today. Crystal items can be heated/cooled to personal taste. The Crystal large glass Kegel wand features 10 inches of pure satisfaction. Featuring a gradual-beaded cylinder, this body-safe beauty brings a new level of satisfaction to your workout.