Clinical studies have proven that vacuum erection devices will give instantly harder erections, cause temporary flacid enlargement and can increase permanent penis augmentation. According to the American Urological Association, these devices may also be useful in cases where such PDE5 drugs as Viagra have failed to work! Doctors view the penis pump as a safe, effectual and cost effective treatment for erectile dysfunction and state that the prolonged use of these devices will enhance the size of the penis permanently. Other advantages of the PUMPED selection are, amongst others, delayed ejaculation, improvement of sexual appetite, boosting of testosterone, the maintenance of longer and harder erections and the supporting of penile tissue after prostate surgery. PUMPED, for instant results! With a total cylinder length of 20cm (7.9") and an inner diameter of 6cm (2.35"), this high-quality pump gives you ample possibilities to grow in both directions! The total length of the hose is 25cm (10")Diameter: 6cm - Length: 30cm - Insertable length: 23cm - Material: PVC & Silicone - Water resistant: Yes - Phthalate free: Yes Color:Clear