These blooming ben wa balls are ideal for exercising Kegel muscles for more control and sexual sensation, as well as exploring your sensual side. Featuring two glass spheres that are weighted perfectly for Kegel conditioning. Simply insert the balls and enjoy the smooth, slick feeling as they create a gentle resistance. Unfold yourself into a blissful experience! The Borosilicate material is durable, non-porous, allergy safe, and suitable for use with any type of lubricant. You can even keep them in during intercourse for a whole new range of exciting and stimulating sensations! Measurements: 1 inch in diameter. Material: Borosilicate glass. Color: Clear