Fetish Fantasy Series Special Edition Medium Black Glass Ben Wa Balls Black. These luxurious black Ben Wa balls are manufactured from borosilicate glass and designed you'll always remember. Their weight and size make sure they are ideal for vaginal stimulation and workout use, and also the nonporous glass is hypo-allergenic and the body safe. With regular use, you'll enjoy improved muscle control and more powerful, more frequent orgasms. Run them under tepid to warm water or put them within the microwave to heat some misconception. Chill them under cold water or insert them in the freezer for any awesome sensation. Cleanup is really a snap following the fun with Pipedream toy cleaner and tepid to warm water. Material: Glass. Country of origin China. Pipedream ProductsCatalog featured this year Fetish Fantasy Special Edition, page 15. No dimensions given March 7, 2013