With each tight ring, your pleasure will be increased. This set of stackable cock and ball rings helps you find you ideal level of retention. As you balls retract during sexual stimulation, this set will provide the sensation of tugging on your scrotum. The pressure and resistance multiplies with each ring you add. Use them one at a time or all 3 together Measurements: Each ring measures 1 inch in diameter unstretched. Material: TPE. Color: Black. Note: Kit contains 2 black rings and 1 grey ring