These artistic gems are made from 100 percent borosilicate glass and are designed to bring pleasure to PC muscle exercises. Once inserted they will help strengthen the kegel muscle while providing rippling effect stimulation. At 1.75 inch x 1 inch in size these eggs are a delicious yet discreet item. Crystal premium glass eggs include a silk storage bag and a detailed instruction manual. Designed to give pleasure and maintain healthy muscle control. Wash toy after each use with liquid anti-bacterial soap and water. Pat dry with soft cotton towel and allow to air dry completely.