His Masturbation Kit contains 3 sturdy, stretchy all purpose rings. Ultra stretchy, compact travel sized masturbator with ridged chamber. Heavy duty stroker with 3 inner suction chambers for explosive results. Thermoplastic Rubber TPR. Size 1 inch diameter large rings, .75 inch diameter medium ring. 4.25 inches by 1.75 inches travel masturbator, 5 inches by 3 inches full size masturbator.