Slurper/tower cap purple and blue

This cap is made for towers and slurpers, no air flow. The blue section has small specks of dichro throughout the twisted lines. Clean firey opal on the side as a roll stop. 17.5mm diameter in the center of ball section. Made to sit in the bevel of larger slurpers and securely on the smaller towers as well. Seals great and stands nicely upside down on the table.