Made from super-smooth and flexible TPE the open-ended masturbator can be effortlessly flipped inside out. Easy-to-use, easy-to-clean, and perfect for solo or partner play. The inner diameter measures 2cm, 0.79 inches, the outer diameter 6.2cm, 2.45. inches and the total height 4cm, 1.58 inches. The masturbator can also be used as a bumper to stop full penetration for those who experience discomfort during intercourse, making it more enjoyable. The partner penetrating will still have the sensation of full insertion without having to try and hold back. Before use, it is recommendable to lubricate yourself and the inside of the stroker with sufficient water-based lube for the best and most satisfying result!