This sheath is opened on the sides, to allow more sensation on your cock during use. The stretchy rubber slips over your rod, helping retain blood flow and adding girth and texture. The vibrating bullet at the base supplies thrilling sensation to both the wearer and the receiver. Measurements: 1.25 inches in diameter unstretched, 3.75 inches in length. Material: TPR. Color: Grey. Note: Vibrating bullet provides up to 40 minutes of use