High-end Finger Grip Pump with Quick Release Valve.Effective hand-grip vacuum penis pump for penis training and enlargement. Combine only with water-based lubricants! What makes this penis pump so special; Significantly increase the power of your erection using the perfectly engineered penis pump - Improve your sexual performance and achieve rock hard erections - Combat treat and overcome erectile dysfunction Highly recommented by doctors after prostate removal or penis erection improvement Treatment Noticeable results within first use, Increase the length and girth of your penis gradually - Penil Implant Surgery - or during Renova Recommended usage for best results is once a day, no more than 20 minutes without giving max pressure. Specifications and characteristics: Length of Silicone Hose: 26 cm Cylinder Length ( insertable ): 22.86 cm Cylinder Inner Diameter: 5.7 cm Pump Material: ABS Sleeves Material: TPR Packaging: Cardboard Display Box Certificate: CE