Crystal Premium Glass Gem Black Butt Plug from NS Novelties. Crystal Glass is 100% hygienically superior borosilicate glass. Annealed for safety and available is a variety of shapes and sizes. Suitable with all lubricants. Brand Crystal Premium Glass. Model NSN-0718-13. UPC 657447104763. Product weight 4.87 ounces. Product dimensions 3.52 inches by 1.57 inches by 1.57 inches. Package dimensions 5 inches by 2.64 inches by 2.01 inches. Insertable dimensions 2.8 inches by 1.22 inches. Product material Glass. NS Novelties - Crystal Premium Glass. Categories: Anal Toys, Small and Medium Butt Plugs, Sextoys for Couples. 2022.