RoHS compliant. Phthalates free. Waterproof vibrations. Materials: Penis Extension Sleeve Thermoplastic Elastomers TPE, Bullet vibrator ABS plastic. Sleeve size insertable shaft diameter 6.375 inches by 1.5325 inches. Bullet vibe size diameter 0.6825 inch by 2.25 inches. Bullet vibrator requires 3 LR44/AG13 batteries.