Fetish Fantasy Series Limited Edition Glass Ben Wa Balls Black Small from Pipedream Products. These luxurious black Ben Wa balls are made from borosilicate glass and designed to last a lifetime. Their size and weight make them perfect for vaginal stimulation and exercise use, and the nonporous glass is hypoallergenic and body safe. With regular use, you will enjoy improved muscle control and stronger, more frequent orgasms. Run them under warm water or place them in the microwave to heat things up. Chill them under cold water or put them in the freezer for a cool sensation. Clean up is a snap after the fun with Pipedream toy cleaner and warm water. Materials Glass. Size 1 inch in diameter. 90 days warranty. Country of origin China. Pipedream Products – Catalog – Fetish Fantasy Limited Edition. Categories: Bondage, Fetish, Kink, Bondage Kits, Kinky Sets, Ben Wa Balls, Kegel Balls. 2022.