Crystal Premium Glass Heart Black Anal 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. Model NSN-0718-33. UPC 657447104824. Product weight 4.94 ounces. Product dimensions 3.46 inches by 1.77 inches by 1.65 inches. Package dimensions 5 inches by 2.64 inches by 2.01 inches. Insertable dimensions 2.72 inches by 1.22 inches. Product material Glass. NS Novelties - Crystal Premium Glass. Categories: Anal Toys, Small and Medium Butt Plugs, Sextoys for Couples.